Finding the Fourth Proportional to 22,620.66, 31,216.59 and 12,549.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,620.66 : 31,216.59 = 12,549.30 : x
2. Step 2: Convert to fraction form
   22,620.66/31,216.59 = 12,549.30/x
3. Step 3: Cross multiply
   22,620.66x = 31,216.59 × 12,549.30
4. Step 4: Simplify right side
   22,620.66x = 391,746,352.89
5. Step 5: Solve for x
   x = 391,746,352.89/22,620.66
6. Step 6: Final answer
   x = 17,318.08