Finding the Fourth Proportional to 22,661.39, 31,272.69 and 12,590.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,661.39 : 31,272.69 = 12,590.76 : x
2. Step 2: Convert to fraction form
   22,661.39/31,272.69 = 12,590.76/x
3. Step 3: Cross multiply
   22,661.39x = 31,272.69 × 12,590.76
4. Step 4: Simplify right side
   22,661.39x = 393,746,934.34
5. Step 5: Solve for x
   x = 393,746,934.34/22,661.39
6. Step 6: Final answer
   x = 17,375.23