Finding the Fourth Proportional to 15,482.68, 21,365.98 and 8,409.15

Step by Step Solution

1. Step 1: Write the proportion equation
   15,482.68 : 21,365.98 = 8,409.15 : x
2. Step 2: Convert to fraction form
   15,482.68/21,365.98 = 8,409.15/x
3. Step 3: Cross multiply
   15,482.68x = 21,365.98 × 8,409.15
4. Step 4: Simplify right side
   15,482.68x = 179,669,709.69
5. Step 5: Solve for x
   x = 179,669,709.69/15,482.68
6. Step 6: Final answer
   x = 11,604.56