Finding the Fourth Proportional to 22,857.16, 31,542.74 and 12,785.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,857.16 : 31,542.74 = 12,785.56 : x
2. Step 2: Convert to fraction form
   22,857.16/31,542.74 = 12,785.56/x
3. Step 3: Cross multiply
   22,857.16x = 31,542.74 × 12,785.56
4. Step 4: Simplify right side
   22,857.16x = 403,291,594.83
5. Step 5: Solve for x
   x = 403,291,594.83/22,857.16
6. Step 6: Final answer
   x = 17,643.99