Finding the Fourth Proportional to 116,115.88, 160,241.67 and 65,139.91

Step by Step Solution

1. Step 1: Write the proportion equation
   116,115.88 : 160,241.67 = 65,139.91 : x
2. Step 2: Convert to fraction form
   116,115.88/160,241.67 = 65,139.91/x
3. Step 3: Cross multiply
   116,115.88x = 160,241.67 × 65,139.91
4. Step 4: Simplify right side
   116,115.88x = 10,438,127,962.05
5. Step 5: Solve for x
   x = 10,438,127,962.05/116,115.88
6. Step 6: Final answer
   x = 89,894.06