Finding the Fourth Proportional to 22,778.28, 31,434.12 and 12,707.33

Step by Step Solution

1. Step 1: Write the proportion equation
   22,778.28 : 31,434.12 = 12,707.33 : x
2. Step 2: Convert to fraction form
   22,778.28/31,434.12 = 12,707.33/x
3. Step 3: Cross multiply
   22,778.28x = 31,434.12 × 12,707.33
4. Step 4: Simplify right side
   22,778.28x = 399,443,578.93
5. Step 5: Solve for x
   x = 399,443,578.93/22,778.28
6. Step 6: Final answer
   x = 17,536.16