Finding the Fourth Proportional to 22,889.88, 31,589.46 and 13,455

Step by Step Solution

1. Step 1: Write the proportion equation
   22,889.88 : 31,589.46 = 13,455 : x
2. Step 2: Convert to fraction form
   22,889.88/31,589.46 = 13,455/x
3. Step 3: Cross multiply
   22,889.88x = 31,589.46 × 13,455
4. Step 4: Simplify right side
   22,889.88x = 425,036,184.30
5. Step 5: Solve for x
   x = 425,036,184.30/22,889.88
6. Step 6: Final answer
   x = 18,568.74