Finding the Fourth Proportional to 22,812.02, 31,479.68 and 12,740.27

Step by Step Solution

1. Step 1: Write the proportion equation
   22,812.02 : 31,479.68 = 12,740.27 : x
2. Step 2: Convert to fraction form
   22,812.02/31,479.68 = 12,740.27/x
3. Step 3: Cross multiply
   22,812.02x = 31,479.68 × 12,740.27
4. Step 4: Simplify right side
   22,812.02x = 401,059,401.61
5. Step 5: Solve for x
   x = 401,059,401.61/22,812.02
6. Step 6: Final answer
   x = 17,581.06