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Finding the Fourth Proportional to 79,410.71, 109,578.71 and 47,578.79

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Solution

The fourth proportional to 79,410.71, 109,578.71 and 47,578.79 is: 65,653.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,410.71 : 109,578.71 = 47,578.79 : x
  2. Step 2: Convert to fraction form
    79,410.71/109,578.71 = 47,578.79/x
  3. Step 3: Cross multiply
    79,410.71x = 109,578.71 × 47,578.79
  4. Step 4: Simplify right side
    79,410.71x = 5,213,621,645.77
  5. Step 5: Solve for x
    x = 5,213,621,645.77/79,410.71
  6. Step 6: Final answer
    x = 65,653.89

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