Finding the Fourth Proportional to 12,387.42, 18,587.51 and 8,230.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,387.42 : 18,587.51 = 8,230.29 : x
2. Step 2: Convert to fraction form
   12,387.42/18,587.51 = 8,230.29/x
3. Step 3: Cross multiply
   12,387.42x = 18,587.51 × 8,230.29
4. Step 4: Simplify right side
   12,387.42x = 152,980,556.53
5. Step 5: Solve for x
   x = 152,980,556.53/12,387.42
6. Step 6: Final answer
   x = 12,349.67