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Finding the Fourth Proportional to 390,861.79, 586,286.53 and 124,620.51

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Solution

The fourth proportional to 390,861.79, 586,286.53 and 124,620.51 is: 186,928.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,861.79 : 586,286.53 = 124,620.51 : x
  2. Step 2: Convert to fraction form
    390,861.79/586,286.53 = 124,620.51/x
  3. Step 3: Cross multiply
    390,861.79x = 586,286.53 × 124,620.51
  4. Step 4: Simplify right side
    390,861.79x = 73,063,327,162.47
  5. Step 5: Solve for x
    x = 73,063,327,162.47/390,861.79
  6. Step 6: Final answer
    x = 186,928.80

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