Finding the Fourth Proportional to 116,538.68, 160,818.30 and 65,550.50

Step by Step Solution

1. Step 1: Write the proportion equation
   116,538.68 : 160,818.30 = 65,550.50 : x
2. Step 2: Convert to fraction form
   116,538.68/160,818.30 = 65,550.50/x
3. Step 3: Cross multiply
   116,538.68x = 160,818.30 × 65,550.50
4. Step 4: Simplify right side
   116,538.68x = 10,541,719,974.15
5. Step 5: Solve for x
   x = 10,541,719,974.15/116,538.68
6. Step 6: Final answer
   x = 90,456.83