Finding the Fourth Proportional to 15,323.56, 21,146.60 and 8,609.47

Step by Step Solution

1. Step 1: Write the proportion equation
   15,323.56 : 21,146.60 = 8,609.47 : x
2. Step 2: Convert to fraction form
   15,323.56/21,146.60 = 8,609.47/x
3. Step 3: Cross multiply
   15,323.56x = 21,146.60 × 8,609.47
4. Step 4: Simplify right side
   15,323.56x = 182,061,018.30
5. Step 5: Solve for x
   x = 182,061,018.30/15,323.56
6. Step 6: Final answer
   x = 11,881.12