Finding the Fourth Proportional to 10,500.99, 14,491.32 and 5,721.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,500.99 : 14,491.32 = 5,721.21 : x
2. Step 2: Convert to fraction form
   10,500.99/14,491.32 = 5,721.21/x
3. Step 3: Cross multiply
   10,500.99x = 14,491.32 × 5,721.21
4. Step 4: Simplify right side
   10,500.99x = 82,907,884.90
5. Step 5: Solve for x
   x = 82,907,884.90/10,500.99
6. Step 6: Final answer
   x = 7,895.24