Finding the Fourth Proportional to 66,520.71, 99,850.73 and 33,278.31

Step by Step Solution

1. Step 1: Write the proportion equation
   66,520.71 : 99,850.73 = 33,278.31 : x
2. Step 2: Convert to fraction form
   66,520.71/99,850.73 = 33,278.31/x
3. Step 3: Cross multiply
   66,520.71x = 99,850.73 × 33,278.31
4. Step 4: Simplify right side
   66,520.71x = 3,322,863,380.27
5. Step 5: Solve for x
   x = 3,322,863,380.27/66,520.71
6. Step 6: Final answer
   x = 49,952.31