Finding the Fourth Proportional to 22,521.35, 31,079.45 and 12,585.35

Step by Step Solution

1. Step 1: Write the proportion equation
   22,521.35 : 31,079.45 = 12,585.35 : x
2. Step 2: Convert to fraction form
   22,521.35/31,079.45 = 12,585.35/x
3. Step 3: Cross multiply
   22,521.35x = 31,079.45 × 12,585.35
4. Step 4: Simplify right side
   22,521.35x = 391,145,756.06
5. Step 5: Solve for x
   x = 391,145,756.06/22,521.35
6. Step 6: Final answer
   x = 17,367.78