Finding the Fourth Proportional to 14,715.72, 22,061.16 and 6,389.43

Step by Step Solution

1. Step 1: Write the proportion equation
   14,715.72 : 22,061.16 = 6,389.43 : x
2. Step 2: Convert to fraction form
   14,715.72/22,061.16 = 6,389.43/x
3. Step 3: Cross multiply
   14,715.72x = 22,061.16 × 6,389.43
4. Step 4: Simplify right side
   14,715.72x = 140,958,237.54
5. Step 5: Solve for x
   x = 140,958,237.54/14,715.72
6. Step 6: Final answer
   x = 9,578.75