Finding the Fourth Proportional to 105,414.76, 145,478.82 and 60,717.16

Step by Step Solution

1. Step 1: Write the proportion equation
   105,414.76 : 145,478.82 = 60,717.16 : x
2. Step 2: Convert to fraction form
   105,414.76/145,478.82 = 60,717.16/x
3. Step 3: Cross multiply
   105,414.76x = 145,478.82 × 60,717.16
4. Step 4: Simplify right side
   105,414.76x = 8,833,060,790.55
5. Step 5: Solve for x
   x = 8,833,060,790.55/105,414.76
6. Step 6: Final answer
   x = 83,793.40