Finding the Fourth Proportional to 66,429.30, 91,674.64 and 39,568.15

Step by Step Solution

1. Step 1: Write the proportion equation
   66,429.30 : 91,674.64 = 39,568.15 : x
2. Step 2: Convert to fraction form
   66,429.30/91,674.64 = 39,568.15/x
3. Step 3: Cross multiply
   66,429.30x = 91,674.64 × 39,568.15
4. Step 4: Simplify right side
   66,429.30x = 3,627,395,906.72
5. Step 5: Solve for x
   x = 3,627,395,906.72/66,429.30
6. Step 6: Final answer
   x = 54,605.36