Finding the Fourth Proportional to 22,612.33, 31,205.45 and 12,402.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,612.33 : 31,205.45 = 12,402.72 : x
2. Step 2: Convert to fraction form
   22,612.33/31,205.45 = 12,402.72/x
3. Step 3: Cross multiply
   22,612.33x = 31,205.45 × 12,402.72
4. Step 4: Simplify right side
   22,612.33x = 387,032,489.83
5. Step 5: Solve for x
   x = 387,032,489.83/22,612.33
6. Step 6: Final answer
   x = 17,115.99