Finding the Fourth Proportional to 22,620.72, 31,216.38 and 12,549.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,620.72 : 31,216.38 = 12,549.18 : x
2. Step 2: Convert to fraction form
   22,620.72/31,216.38 = 12,549.18/x
3. Step 3: Cross multiply
   22,620.72x = 31,216.38 × 12,549.18
4. Step 4: Simplify right side
   22,620.72x = 391,739,971.57
5. Step 5: Solve for x
   x = 391,739,971.57/22,620.72
6. Step 6: Final answer
   x = 17,317.75