Finding the Fourth Proportional to 22,819.98, 31,491.30 and 12,749.40

Step by Step Solution

1. Step 1: Write the proportion equation
   22,819.98 : 31,491.30 = 12,749.40 : x
2. Step 2: Convert to fraction form
   22,819.98/31,491.30 = 12,749.40/x
3. Step 3: Cross multiply
   22,819.98x = 31,491.30 × 12,749.40
4. Step 4: Simplify right side
   22,819.98x = 401,495,180.22
5. Step 5: Solve for x
   x = 401,495,180.22/22,819.98
6. Step 6: Final answer
   x = 17,594.02