Finding the Fourth Proportional to 8,111.63, 12,165.61 and 3,724.87

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.63 : 12,165.61 = 3,724.87 : x
2. Step 2: Convert to fraction form
   8,111.63/12,165.61 = 3,724.87/x
3. Step 3: Cross multiply
   8,111.63x = 12,165.61 × 3,724.87
4. Step 4: Simplify right side
   8,111.63x = 45,315,315.72
5. Step 5: Solve for x
   x = 45,315,315.72/8,111.63
6. Step 6: Final answer
   x = 5,586.46