Finding the Fourth Proportional to 22,786.42, 31,445.20 and 12,714.75

Step by Step Solution

1. Step 1: Write the proportion equation
   22,786.42 : 31,445.20 = 12,714.75 : x
2. Step 2: Convert to fraction form
   22,786.42/31,445.20 = 12,714.75/x
3. Step 3: Cross multiply
   22,786.42x = 31,445.20 × 12,714.75
4. Step 4: Simplify right side
   22,786.42x = 399,817,824.91
5. Step 5: Solve for x
   x = 399,817,824.91/22,786.42
6. Step 6: Final answer
   x = 17,546.32