Finding the Fourth Proportional to 116,101.68, 160,233.76 and 65,128.40

Step by Step Solution

1. Step 1: Write the proportion equation
   116,101.68 : 160,233.76 = 65,128.40 : x
2. Step 2: Convert to fraction form
   116,101.68/160,233.76 = 65,128.40/x
3. Step 3: Cross multiply
   116,101.68x = 160,233.76 × 65,128.40
4. Step 4: Simplify right side
   116,101.68x = 10,435,768,414.78
5. Step 5: Solve for x
   x = 10,435,768,414.78/116,101.68
6. Step 6: Final answer
   x = 89,884.73