Finding the Fourth Proportional to 81,141.90, 121,606.76 and 58,728.04

Step by Step Solution

1. Step 1: Write the proportion equation
   81,141.90 : 121,606.76 = 58,728.04 : x
2. Step 2: Convert to fraction form
   81,141.90/121,606.76 = 58,728.04/x
3. Step 3: Cross multiply
   81,141.90x = 121,606.76 × 58,728.04
4. Step 4: Simplify right side
   81,141.90x = 7,141,726,665.55
5. Step 5: Solve for x
   x = 7,141,726,665.55/81,141.90
6. Step 6: Final answer
   x = 88,015.28