Finding the Fourth Proportional to 22,550.85, 31,118.22 and 12,988.26

Step by Step Solution

1. Step 1: Write the proportion equation
   22,550.85 : 31,118.22 = 12,988.26 : x
2. Step 2: Convert to fraction form
   22,550.85/31,118.22 = 12,988.26/x
3. Step 3: Cross multiply
   22,550.85x = 31,118.22 × 12,988.26
4. Step 4: Simplify right side
   22,550.85x = 404,171,532.10
5. Step 5: Solve for x
   x = 404,171,532.10/22,550.85
6. Step 6: Final answer
   x = 17,922.67