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Finding the Fourth Proportional to 708,311.73, 977,504.84 and 398,311.88

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Solution

The fourth proportional to 708,311.73, 977,504.84 and 398,311.88 is: 549,689.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,311.73 : 977,504.84 = 398,311.88 : x
  2. Step 2: Convert to fraction form
    708,311.73/977,504.84 = 398,311.88/x
  3. Step 3: Cross multiply
    708,311.73x = 977,504.84 × 398,311.88
  4. Step 4: Simplify right side
    708,311.73x = 389,351,783,650.42
  5. Step 5: Solve for x
    x = 389,351,783,650.42/708,311.73
  6. Step 6: Final answer
    x = 549,689.87

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