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Finding the Fourth Proportional to 287,980.45, 431,921.44 and 77,569.18

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Solution

The fourth proportional to 287,980.45, 431,921.44 and 77,569.18 is: 116,340.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,980.45 : 431,921.44 = 77,569.18 : x
  2. Step 2: Convert to fraction form
    287,980.45/431,921.44 = 77,569.18/x
  3. Step 3: Cross multiply
    287,980.45x = 431,921.44 × 77,569.18
  4. Step 4: Simplify right side
    287,980.45x = 33,503,790,942.38
  5. Step 5: Solve for x
    x = 33,503,790,942.38/287,980.45
  6. Step 6: Final answer
    x = 116,340.51

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