Finding the Fourth Proportional to 66,081.75, 91,151.33 and 39,205.23

Step by Step Solution

1. Step 1: Write the proportion equation
   66,081.75 : 91,151.33 = 39,205.23 : x
2. Step 2: Convert to fraction form
   66,081.75/91,151.33 = 39,205.23/x
3. Step 3: Cross multiply
   66,081.75x = 91,151.33 × 39,205.23
4. Step 4: Simplify right side
   66,081.75x = 3,573,608,661.43
5. Step 5: Solve for x
   x = 3,573,608,661.43/66,081.75
6. Step 6: Final answer
   x = 54,078.60