Finding the Fourth Proportional to 116,042.50, 160,138.81 and 65,744.90

Step by Step Solution

1. Step 1: Write the proportion equation
   116,042.50 : 160,138.81 = 65,744.90 : x
2. Step 2: Convert to fraction form
   116,042.50/160,138.81 = 65,744.90/x
3. Step 3: Cross multiply
   116,042.50x = 160,138.81 × 65,744.90
4. Step 4: Simplify right side
   116,042.50x = 10,528,310,049.57
5. Step 5: Solve for x
   x = 10,528,310,049.57/116,042.50
6. Step 6: Final answer
   x = 90,728.05