Finding the Fourth Proportional to 22,555.34, 31,128.68 and 12,995.61

Step by Step Solution

1. Step 1: Write the proportion equation
   22,555.34 : 31,128.68 = 12,995.61 : x
2. Step 2: Convert to fraction form
   22,555.34/31,128.68 = 12,995.61/x
3. Step 3: Cross multiply
   22,555.34x = 31,128.68 × 12,995.61
4. Step 4: Simplify right side
   22,555.34x = 404,536,120.12
5. Step 5: Solve for x
   x = 404,536,120.12/22,555.34
6. Step 6: Final answer
   x = 17,935.27