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Finding the Fourth Proportional to 978,211.90, 1,366,697.30 and 978,211.90

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Solution

The fourth proportional to 978,211.90, 1,366,697.30 and 978,211.90 is: 1,366,697.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,211.90 : 1,366,697.30 = 978,211.90 : x
  2. Step 2: Convert to fraction form
    978,211.90/1,366,697.30 = 978,211.90/x
  3. Step 3: Cross multiply
    978,211.90x = 1,366,697.30 × 978,211.90
  4. Step 4: Simplify right side
    978,211.90x = 1,336,919,562,557.87
  5. Step 5: Solve for x
    x = 1,336,919,562,557.87/978,211.90
  6. Step 6: Final answer
    x = 1,366,697.30

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