Finding the Fourth Proportional to 15,540.30, 21,445.86 and 8,466.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,540.30 : 21,445.86 = 8,466.72 : x
2. Step 2: Convert to fraction form
   15,540.30/21,445.86 = 8,466.72/x
3. Step 3: Cross multiply
   15,540.30x = 21,445.86 × 8,466.72
4. Step 4: Simplify right side
   15,540.30x = 181,576,091.78
5. Step 5: Solve for x
   x = 181,576,091.78/15,540.30
6. Step 6: Final answer
   x = 11,684.21