Finding the Fourth Proportional to 66,086.55, 91,200.15 and 35,872.16

Step by Step Solution

1. Step 1: Write the proportion equation
   66,086.55 : 91,200.15 = 35,872.16 : x
2. Step 2: Convert to fraction form
   66,086.55/91,200.15 = 35,872.16/x
3. Step 3: Cross multiply
   66,086.55x = 91,200.15 × 35,872.16
4. Step 4: Simplify right side
   66,086.55x = 3,271,545,916.82
5. Step 5: Solve for x
   x = 3,271,545,916.82/66,086.55
6. Step 6: Final answer
   x = 49,503.96