Finding the Fourth Proportional to 10,608.10, 14,621.72 and 8,479.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,608.10 : 14,621.72 = 8,479.89 : x
2. Step 2: Convert to fraction form
   10,608.10/14,621.72 = 8,479.89/x
3. Step 3: Cross multiply
   10,608.10x = 14,621.72 × 8,479.89
4. Step 4: Simplify right side
   10,608.10x = 123,990,534.81
5. Step 5: Solve for x
   x = 123,990,534.81/10,608.10
6. Step 6: Final answer
   x = 11,688.29