Finding the Fourth Proportional to 22,806.28, 31,468.72 and 12,734.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,806.28 : 31,468.72 = 12,734.20 : x
2. Step 2: Convert to fraction form
   22,806.28/31,468.72 = 12,734.20/x
3. Step 3: Cross multiply
   22,806.28x = 31,468.72 × 12,734.20
4. Step 4: Simplify right side
   22,806.28x = 400,728,974.22
5. Step 5: Solve for x
   x = 400,728,974.22/22,806.28
6. Step 6: Final answer
   x = 17,570.99