Finding the Fourth Proportional to 12,386.43, 18,585.09 and 5,812.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,386.43 : 18,585.09 = 5,812.05 : x
2. Step 2: Convert to fraction form
   12,386.43/18,585.09 = 5,812.05/x
3. Step 3: Cross multiply
   12,386.43x = 18,585.09 × 5,812.05
4. Step 4: Simplify right side
   12,386.43x = 108,017,472.33
5. Step 5: Solve for x
   x = 108,017,472.33/12,386.43
6. Step 6: Final answer
   x = 8,720.63