Finding the Fourth Proportional to 116,104.14, 160,225.55 and 65,128.20

Step by Step Solution

1. Step 1: Write the proportion equation
   116,104.14 : 160,225.55 = 65,128.20 : x
2. Step 2: Convert to fraction form
   116,104.14/160,225.55 = 65,128.20/x
3. Step 3: Cross multiply
   116,104.14x = 160,225.55 × 65,128.20
4. Step 4: Simplify right side
   116,104.14x = 10,435,201,339.87
5. Step 5: Solve for x
   x = 10,435,201,339.87/116,104.14
6. Step 6: Final answer
   x = 89,877.94