Finding the Fourth Proportional to 22,767.30, 31,418.74 and 12,695.86

Step by Step Solution

1. Step 1: Write the proportion equation
   22,767.30 : 31,418.74 = 12,695.86 : x
2. Step 2: Convert to fraction form
   22,767.30/31,418.74 = 12,695.86/x
3. Step 3: Cross multiply
   22,767.30x = 31,418.74 × 12,695.86
4. Step 4: Simplify right side
   22,767.30x = 398,887,996.51
5. Step 5: Solve for x
   x = 398,887,996.51/22,767.30
6. Step 6: Final answer
   x = 17,520.21