Finding the Fourth Proportional to 22,890.74, 31,591.82 and 13,943.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,890.74 : 31,591.82 = 13,943.48 : x
2. Step 2: Convert to fraction form
   22,890.74/31,591.82 = 13,943.48/x
3. Step 3: Cross multiply
   22,890.74x = 31,591.82 × 13,943.48
4. Step 4: Simplify right side
   22,890.74x = 440,499,787.23
5. Step 5: Solve for x
   x = 440,499,787.23/22,890.74
6. Step 6: Final answer
   x = 19,243.58