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Finding the Fourth Proportional to 715,661.20, 987,620.22 and 388,974.16

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Solution

The fourth proportional to 715,661.20, 987,620.22 and 388,974.16 is: 536,788.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,661.20 : 987,620.22 = 388,974.16 : x
  2. Step 2: Convert to fraction form
    715,661.20/987,620.22 = 388,974.16/x
  3. Step 3: Cross multiply
    715,661.20x = 987,620.22 × 388,974.16
  4. Step 4: Simplify right side
    715,661.20x = 384,158,745,473.52
  5. Step 5: Solve for x
    x = 384,158,745,473.52/715,661.20
  6. Step 6: Final answer
    x = 536,788.56

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