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Finding the Fourth Proportional to 505,318.10, 697,320.70 and 278,958.74

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Solution

The fourth proportional to 505,318.10, 697,320.70 and 278,958.74 is: 384,952.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,318.10 : 697,320.70 = 278,958.74 : x
  2. Step 2: Convert to fraction form
    505,318.10/697,320.70 = 278,958.74/x
  3. Step 3: Cross multiply
    505,318.10x = 697,320.70 × 278,958.74
  4. Step 4: Simplify right side
    505,318.10x = 194,523,699,663.92
  5. Step 5: Solve for x
    x = 194,523,699,663.92/505,318.10
  6. Step 6: Final answer
    x = 384,952.97

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