Finding the Fourth Proportional to 22,957, 31,679.30 and 12,883.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,957 : 31,679.30 = 12,883.32 : x
2. Step 2: Convert to fraction form
   22,957/31,679.30 = 12,883.32/x
3. Step 3: Cross multiply
   22,957x = 31,679.30 × 12,883.32
4. Step 4: Simplify right side
   22,957x = 408,134,559.28
5. Step 5: Solve for x
   x = 408,134,559.28/22,957
6. Step 6: Final answer
   x = 17,778.22