Finding the Fourth Proportional to 22,821.10, 31,492.80 and 12,749.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,821.10 : 31,492.80 = 12,749.72 : x
2. Step 2: Convert to fraction form
   22,821.10/31,492.80 = 12,749.72/x
3. Step 3: Cross multiply
   22,821.10x = 31,492.80 × 12,749.72
4. Step 4: Simplify right side
   22,821.10x = 401,524,382.02
5. Step 5: Solve for x
   x = 401,524,382.02/22,821.10
6. Step 6: Final answer
   x = 17,594.44