Finding the Fourth Proportional to 116,640.24, 160,934.88 and 65,643

Step by Step Solution

1. Step 1: Write the proportion equation
   116,640.24 : 160,934.88 = 65,643 : x
2. Step 2: Convert to fraction form
   116,640.24/160,934.88 = 65,643/x
3. Step 3: Cross multiply
   116,640.24x = 160,934.88 × 65,643
4. Step 4: Simplify right side
   116,640.24x = 10,564,248,327.84
5. Step 5: Solve for x
   x = 10,564,248,327.84/116,640.24
6. Step 6: Final answer
   x = 90,571.22