Finding the Fourth Proportional to 15,300.38, 21,114.24 and 8,585.48

Step by Step Solution

1. Step 1: Write the proportion equation
   15,300.38 : 21,114.24 = 8,585.48 : x
2. Step 2: Convert to fraction form
   15,300.38/21,114.24 = 8,585.48/x
3. Step 3: Cross multiply
   15,300.38x = 21,114.24 × 8,585.48
4. Step 4: Simplify right side
   15,300.38x = 181,275,859.50
5. Step 5: Solve for x
   x = 181,275,859.50/15,300.38
6. Step 6: Final answer
   x = 11,847.80