Finding the Fourth Proportional to 22,827.88, 31,499.94 and 12,891.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,827.88 : 31,499.94 = 12,891.88 : x
2. Step 2: Convert to fraction form
   22,827.88/31,499.94 = 12,891.88/x
3. Step 3: Cross multiply
   22,827.88x = 31,499.94 × 12,891.88
4. Step 4: Simplify right side
   22,827.88x = 406,093,446.49
5. Step 5: Solve for x
   x = 406,093,446.49/22,827.88
6. Step 6: Final answer
   x = 17,789.36