Finding the Fourth Proportional to 15,300.42, 21,113.72 and 8,585.44

Step by Step Solution

1. Step 1: Write the proportion equation
   15,300.42 : 21,113.72 = 8,585.44 : x
2. Step 2: Convert to fraction form
   15,300.42/21,113.72 = 8,585.44/x
3. Step 3: Cross multiply
   15,300.42x = 21,113.72 × 8,585.44
4. Step 4: Simplify right side
   15,300.42x = 181,270,576.24
5. Step 5: Solve for x
   x = 181,270,576.24/15,300.42
6. Step 6: Final answer
   x = 11,847.42