Finding the Fourth Proportional to 15,322.81, 21,145.56 and 8,608.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,322.81 : 21,145.56 = 8,608.72 : x
2. Step 2: Convert to fraction form
   15,322.81/21,145.56 = 8,608.72/x
3. Step 3: Cross multiply
   15,322.81x = 21,145.56 × 8,608.72
4. Step 4: Simplify right side
   15,322.81x = 182,036,205.28
5. Step 5: Solve for x
   x = 182,036,205.28/15,322.81
6. Step 6: Final answer
   x = 11,880.08