Finding the Fourth Proportional to 22,857.72, 31,540.79 and 12,784.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,857.72 : 31,540.79 = 12,784.52 : x
2. Step 2: Convert to fraction form
   22,857.72/31,540.79 = 12,784.52/x
3. Step 3: Cross multiply
   22,857.72x = 31,540.79 × 12,784.52
4. Step 4: Simplify right side
   22,857.72x = 403,233,860.57
5. Step 5: Solve for x
   x = 403,233,860.57/22,857.72
6. Step 6: Final answer
   x = 17,641.04