Finding the Fourth Proportional to 22,521, 31,079.94 and 12,585

Step by Step Solution

1. Step 1: Write the proportion equation
   22,521 : 31,079.94 = 12,585 : x
2. Step 2: Convert to fraction form
   22,521/31,079.94 = 12,585/x
3. Step 3: Cross multiply
   22,521x = 31,079.94 × 12,585
4. Step 4: Simplify right side
   22,521x = 391,141,044.90
5. Step 5: Solve for x
   x = 391,141,044.90/22,521
6. Step 6: Final answer
   x = 17,367.84