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Finding the Fourth Proportional to 708,776, 978,110.88 and 390,824

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Solution

The fourth proportional to 708,776, 978,110.88 and 390,824 is: 539,337.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,776 : 978,110.88 = 390,824 : x
  2. Step 2: Convert to fraction form
    708,776/978,110.88 = 390,824/x
  3. Step 3: Cross multiply
    708,776x = 978,110.88 × 390,824
  4. Step 4: Simplify right side
    708,776x = 382,269,206,565.12
  5. Step 5: Solve for x
    x = 382,269,206,565.12/708,776
  6. Step 6: Final answer
    x = 539,337.12

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