Finding the Fourth Proportional to 116,411.60, 160,591.56 and 78,683.60

Step by Step Solution

1. Step 1: Write the proportion equation
   116,411.60 : 160,591.56 = 78,683.60 : x
2. Step 2: Convert to fraction form
   116,411.60/160,591.56 = 78,683.60/x
3. Step 3: Cross multiply
   116,411.60x = 160,591.56 × 78,683.60
4. Step 4: Simplify right side
   116,411.60x = 12,635,922,070.42
5. Step 5: Solve for x
   x = 12,635,922,070.42/116,411.60
6. Step 6: Final answer
   x = 108,545.21