Finding the Fourth Proportional to 66,067.89, 91,172.71 and 38,847.05

Step by Step Solution

1. Step 1: Write the proportion equation
   66,067.89 : 91,172.71 = 38,847.05 : x
2. Step 2: Convert to fraction form
   66,067.89/91,172.71 = 38,847.05/x
3. Step 3: Cross multiply
   66,067.89x = 91,172.71 × 38,847.05
4. Step 4: Simplify right side
   66,067.89x = 3,541,790,824.01
5. Step 5: Solve for x
   x = 3,541,790,824.01/66,067.89
6. Step 6: Final answer
   x = 53,608.35