Finding the Fourth Proportional to 22,821.12, 31,492.88 and 12,749.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,821.12 : 31,492.88 = 12,749.76 : x
2. Step 2: Convert to fraction form
   22,821.12/31,492.88 = 12,749.76/x
3. Step 3: Cross multiply
   22,821.12x = 31,492.88 × 12,749.76
4. Step 4: Simplify right side
   22,821.12x = 401,526,661.71
5. Step 5: Solve for x
   x = 401,526,661.71/22,821.12
6. Step 6: Final answer
   x = 17,594.52