Finding the Fourth Proportional to 112,510.77, 155,191.71 and 72,160.62

Step by Step Solution

1. Step 1: Write the proportion equation
   112,510.77 : 155,191.71 = 72,160.62 : x
2. Step 2: Convert to fraction form
   112,510.77/155,191.71 = 72,160.62/x
3. Step 3: Cross multiply
   112,510.77x = 155,191.71 × 72,160.62
4. Step 4: Simplify right side
   112,510.77x = 11,198,730,012.46
5. Step 5: Solve for x
   x = 11,198,730,012.46/112,510.77
6. Step 6: Final answer
   x = 99,534.74