Finding the Fourth Proportional to 22,820.18, 31,491.77 and 12,748.66

Step by Step Solution

1. Step 1: Write the proportion equation
   22,820.18 : 31,491.77 = 12,748.66 : x
2. Step 2: Convert to fraction form
   22,820.18/31,491.77 = 12,748.66/x
3. Step 3: Cross multiply
   22,820.18x = 31,491.77 × 12,748.66
4. Step 4: Simplify right side
   22,820.18x = 401,477,726.06
5. Step 5: Solve for x
   x = 401,477,726.06/22,820.18
6. Step 6: Final answer
   x = 17,593.10