Finding the Fourth Proportional to 116,205.88, 160,357 and 65,209.90

Step by Step Solution

1. Step 1: Write the proportion equation
   116,205.88 : 160,357 = 65,209.90 : x
2. Step 2: Convert to fraction form
   116,205.88/160,357 = 65,209.90/x
3. Step 3: Cross multiply
   116,205.88x = 160,357 × 65,209.90
4. Step 4: Simplify right side
   116,205.88x = 10,456,863,934.30
5. Step 5: Solve for x
   x = 10,456,863,934.30/116,205.88
6. Step 6: Final answer
   x = 89,985.67