Finding the Fourth Proportional to 108,762.50, 150,093.72 and 81,490.20

Step by Step Solution

1. Step 1: Write the proportion equation
   108,762.50 : 150,093.72 = 81,490.20 : x
2. Step 2: Convert to fraction form
   108,762.50/150,093.72 = 81,490.20/x
3. Step 3: Cross multiply
   108,762.50x = 150,093.72 × 81,490.20
4. Step 4: Simplify right side
   108,762.50x = 12,231,167,261.54
5. Step 5: Solve for x
   x = 12,231,167,261.54/108,762.50
6. Step 6: Final answer
   x = 112,457.58