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Finding the Fourth Proportional to 978,117.15, 1,366,564.65 and 978,117.15

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Solution

The fourth proportional to 978,117.15, 1,366,564.65 and 978,117.15 is: 1,366,564.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,117.15 : 1,366,564.65 = 978,117.15 : x
  2. Step 2: Convert to fraction form
    978,117.15/1,366,564.65 = 978,117.15/x
  3. Step 3: Cross multiply
    978,117.15x = 1,366,564.65 × 978,117.15
  4. Step 4: Simplify right side
    978,117.15x = 1,336,660,320,748.75
  5. Step 5: Solve for x
    x = 1,336,660,320,748.75/978,117.15
  6. Step 6: Final answer
    x = 1,366,564.65

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