Finding the Fourth Proportional to 20,989.82, 31,488.89 and 5,997.07

Step by Step Solution

1. Step 1: Write the proportion equation
   20,989.82 : 31,488.89 = 5,997.07 : x
2. Step 2: Convert to fraction form
   20,989.82/31,488.89 = 5,997.07/x
3. Step 3: Cross multiply
   20,989.82x = 31,488.89 × 5,997.07
4. Step 4: Simplify right side
   20,989.82x = 188,840,909.80
5. Step 5: Solve for x
   x = 188,840,909.80/20,989.82
6. Step 6: Final answer
   x = 8,996.79