Finding the Fourth Proportional to 22,793.10, 31,451.34 and 12,720.59

Step by Step Solution

1. Step 1: Write the proportion equation
   22,793.10 : 31,451.34 = 12,720.59 : x
2. Step 2: Convert to fraction form
   22,793.10/31,451.34 = 12,720.59/x
3. Step 3: Cross multiply
   22,793.10x = 31,451.34 × 12,720.59
4. Step 4: Simplify right side
   22,793.10x = 400,079,714.84
5. Step 5: Solve for x
   x = 400,079,714.84/22,793.10
6. Step 6: Final answer
   x = 17,552.67