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Finding the Fourth Proportional to 978,357.45, 1,372,188.75 and 978,357.45

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Solution

The fourth proportional to 978,357.45, 1,372,188.75 and 978,357.45 is: 1,372,188.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,357.45 : 1,372,188.75 = 978,357.45 : x
  2. Step 2: Convert to fraction form
    978,357.45/1,372,188.75 = 978,357.45/x
  3. Step 3: Cross multiply
    978,357.45x = 1,372,188.75 × 978,357.45
  4. Step 4: Simplify right side
    978,357.45x = 1,342,491,086,368.69
  5. Step 5: Solve for x
    x = 1,342,491,086,368.69/978,357.45
  6. Step 6: Final answer
    x = 1,372,188.75

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