Finding the Fourth Proportional to 22,576.50, 31,116.69 and 21,222.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,576.50 : 31,116.69 = 21,222.18 : x
2. Step 2: Convert to fraction form
   22,576.50/31,116.69 = 21,222.18/x
3. Step 3: Cross multiply
   22,576.50x = 31,116.69 × 21,222.18
4. Step 4: Simplify right side
   22,576.50x = 660,363,996.18
5. Step 5: Solve for x
   x = 660,363,996.18/22,576.50
6. Step 6: Final answer
   x = 29,250.06