Finding the Fourth Proportional to 22,820.88, 31,490.76 and 12,748.44

Step by Step Solution

1. Step 1: Write the proportion equation
   22,820.88 : 31,490.76 = 12,748.44 : x
2. Step 2: Convert to fraction form
   22,820.88/31,490.76 = 12,748.44/x
3. Step 3: Cross multiply
   22,820.88x = 31,490.76 × 12,748.44
4. Step 4: Simplify right side
   22,820.88x = 401,458,064.41
5. Step 5: Solve for x
   x = 401,458,064.41/22,820.88
6. Step 6: Final answer
   x = 17,591.70