Finding the Fourth Proportional to 22,990.72, 31,730.40 and 13,433.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,990.72 : 31,730.40 = 13,433.76 : x
2. Step 2: Convert to fraction form
   22,990.72/31,730.40 = 13,433.76/x
3. Step 3: Cross multiply
   22,990.72x = 31,730.40 × 13,433.76
4. Step 4: Simplify right side
   22,990.72x = 426,258,578.30
5. Step 5: Solve for x
   x = 426,258,578.30/22,990.72
6. Step 6: Final answer
   x = 18,540.46