Finding the Fourth Proportional to 116,116.88, 160,243.05 and 65,140.91

Step by Step Solution

1. Step 1: Write the proportion equation
   116,116.88 : 160,243.05 = 65,140.91 : x
2. Step 2: Convert to fraction form
   116,116.88/160,243.05 = 65,140.91/x
3. Step 3: Cross multiply
   116,116.88x = 160,243.05 × 65,140.91
4. Step 4: Simplify right side
   116,116.88x = 10,438,378,098.18
5. Step 5: Solve for x
   x = 10,438,378,098.18/116,116.88
6. Step 6: Final answer
   x = 89,895.44