Finding the Fourth Proportional to 22,555.35, 31,128.69 and 12,995.61

Step by Step Solution

1. Step 1: Write the proportion equation
   22,555.35 : 31,128.69 = 12,995.61 : x
2. Step 2: Convert to fraction form
   22,555.35/31,128.69 = 12,995.61/x
3. Step 3: Cross multiply
   22,555.35x = 31,128.69 × 12,995.61
4. Step 4: Simplify right side
   22,555.35x = 404,536,315.05
5. Step 5: Solve for x
   x = 404,536,315.05/22,555.35
6. Step 6: Final answer
   x = 17,935.27