Finding the Fourth Proportional to 78,098.31, 107,776.17 and 42,288.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,098.31 : 107,776.17 = 42,288.62 : x
2. Step 2: Convert to fraction form
   78,098.31/107,776.17 = 42,288.62/x
3. Step 3: Cross multiply
   78,098.31x = 107,776.17 × 42,288.62
4. Step 4: Simplify right side
   78,098.31x = 4,557,704,959.30
5. Step 5: Solve for x
   x = 4,557,704,959.30/78,098.31
6. Step 6: Final answer
   x = 58,358.56