Finding the Fourth Proportional to 20,698.68, 31,023.72 and 9,581.89

Step by Step Solution

1. Step 1: Write the proportion equation
   20,698.68 : 31,023.72 = 9,581.89 : x
2. Step 2: Convert to fraction form
   20,698.68/31,023.72 = 9,581.89/x
3. Step 3: Cross multiply
   20,698.68x = 31,023.72 × 9,581.89
4. Step 4: Simplify right side
   20,698.68x = 297,265,872.43
5. Step 5: Solve for x
   x = 297,265,872.43/20,698.68
6. Step 6: Final answer
   x = 14,361.59