Finding the Fourth Proportional to 114,561.46, 171,755.79 and 75,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   114,561.46 : 171,755.79 = 75,128.50 : x
2. Step 2: Convert to fraction form
   114,561.46/171,755.79 = 75,128.50/x
3. Step 3: Cross multiply
   114,561.46x = 171,755.79 × 75,128.50
4. Step 4: Simplify right side
   114,561.46x = 12,903,754,869.02
5. Step 5: Solve for x
   x = 12,903,754,869.02/114,561.46
6. Step 6: Final answer
   x = 112,636.09