Finding the Fourth Proportional to 426,568.20, 639,477.36 and 174,061.32

Step by Step Solution

1. Step 1: Write the proportion equation
   426,568.20 : 639,477.36 = 174,061.32 : x
2. Step 2: Convert to fraction form
   426,568.20/639,477.36 = 174,061.32/x
3. Step 3: Cross multiply
   426,568.20x = 639,477.36 × 174,061.32
4. Step 4: Simplify right side
   426,568.20x = 111,308,273,391.72
5. Step 5: Solve for x
   x = 111,308,273,391.72/426,568.20
6. Step 6: Final answer
   x = 260,938.99