Finding the Fourth Proportional to 22,891.88, 31,589.30 and 12,818.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,891.88 : 31,589.30 = 12,818.02 : x
2. Step 2: Convert to fraction form
   22,891.88/31,589.30 = 12,818.02/x
3. Step 3: Cross multiply
   22,891.88x = 31,589.30 × 12,818.02
4. Step 4: Simplify right side
   22,891.88x = 404,912,100.93
5. Step 5: Solve for x
   x = 404,912,100.93/22,891.88
6. Step 6: Final answer
   x = 17,688.02