Finding the Fourth Proportional to 14,404.50, 21,571.92 and 6,990.57

Step by Step Solution

1. Step 1: Write the proportion equation
   14,404.50 : 21,571.92 = 6,990.57 : x
2. Step 2: Convert to fraction form
   14,404.50/21,571.92 = 6,990.57/x
3. Step 3: Cross multiply
   14,404.50x = 21,571.92 × 6,990.57
4. Step 4: Simplify right side
   14,404.50x = 150,800,016.79
5. Step 5: Solve for x
   x = 150,800,016.79/14,404.50
6. Step 6: Final answer
   x = 10,468.95