Finding the Fourth Proportional to 12,431.61, 18,650.49 and 5,856.26

Step by Step Solution

1. Step 1: Write the proportion equation
   12,431.61 : 18,650.49 = 5,856.26 : x
2. Step 2: Convert to fraction form
   12,431.61/18,650.49 = 5,856.26/x
3. Step 3: Cross multiply
   12,431.61x = 18,650.49 × 5,856.26
4. Step 4: Simplify right side
   12,431.61x = 109,222,025.31
5. Step 5: Solve for x
   x = 109,222,025.31/12,431.61
6. Step 6: Final answer
   x = 8,785.83