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Finding the Fourth Proportional to 678,908.88, 936,909.72 and 372,990

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Solution

The fourth proportional to 678,908.88, 936,909.72 and 372,990 is: 514,734.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,908.88 : 936,909.72 = 372,990 : x
  2. Step 2: Convert to fraction form
    678,908.88/936,909.72 = 372,990/x
  3. Step 3: Cross multiply
    678,908.88x = 936,909.72 × 372,990
  4. Step 4: Simplify right side
    678,908.88x = 349,457,956,462.80
  5. Step 5: Solve for x
    x = 349,457,956,462.80/678,908.88
  6. Step 6: Final answer
    x = 514,734.70

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