Finding the Fourth Proportional to 113,886.10, 170,829.15 and 72,414.10

Step by Step Solution

1. Step 1: Write the proportion equation
   113,886.10 : 170,829.15 = 72,414.10 : x
2. Step 2: Convert to fraction form
   113,886.10/170,829.15 = 72,414.10/x
3. Step 3: Cross multiply
   113,886.10x = 170,829.15 × 72,414.10
4. Step 4: Simplify right side
   113,886.10x = 12,370,439,151.02
5. Step 5: Solve for x
   x = 12,370,439,151.02/113,886.10
6. Step 6: Final answer
   x = 108,621.15