Finding the Fourth Proportional to 103,553.54, 142,908.00 and 58,231.31

Step by Step Solution

1. Step 1: Write the proportion equation
   103,553.54 : 142,908.00 = 58,231.31 : x
2. Step 2: Convert to fraction form
   103,553.54/142,908.00 = 58,231.31/x
3. Step 3: Cross multiply
   103,553.54x = 142,908.00 × 58,231.31
4. Step 4: Simplify right side
   103,553.54x = 8,321,719,116.57
5. Step 5: Solve for x
   x = 8,321,719,116.57/103,553.54
6. Step 6: Final answer
   x = 80,361.51