Finding the Fourth Proportional to 10,887.72, 16,329.15 and 4,315.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,887.72 : 16,329.15 = 4,315.38 : x
2. Step 2: Convert to fraction form
   10,887.72/16,329.15 = 4,315.38/x
3. Step 3: Cross multiply
   10,887.72x = 16,329.15 × 4,315.38
4. Step 4: Simplify right side
   10,887.72x = 70,466,487.33
5. Step 5: Solve for x
   x = 70,466,487.33/10,887.72
6. Step 6: Final answer
   x = 6,472.11