Finding the Fourth Proportional to 15,258.67, 21,057.30 and 8,544.78

Step by Step Solution

1. Step 1: Write the proportion equation
   15,258.67 : 21,057.30 = 8,544.78 : x
2. Step 2: Convert to fraction form
   15,258.67/21,057.30 = 8,544.78/x
3. Step 3: Cross multiply
   15,258.67x = 21,057.30 × 8,544.78
4. Step 4: Simplify right side
   15,258.67x = 179,929,995.89
5. Step 5: Solve for x
   x = 179,929,995.89/15,258.67
6. Step 6: Final answer
   x = 11,791.99