Finding the Fourth Proportional to 22,479.90, 31,023.30 and 12,922.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,479.90 : 31,023.30 = 12,922.89 : x
2. Step 2: Convert to fraction form
   22,479.90/31,023.30 = 12,922.89/x
3. Step 3: Cross multiply
   22,479.90x = 31,023.30 × 12,922.89
4. Step 4: Simplify right side
   22,479.90x = 400,910,727.28
5. Step 5: Solve for x
   x = 400,910,727.28/22,479.90
6. Step 6: Final answer
   x = 17,834.18