Finding the Fourth Proportional to 12,411.16, 18,615.83 and 3,646.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,411.16 : 18,615.83 = 3,646.76 : x
2. Step 2: Convert to fraction form
   12,411.16/18,615.83 = 3,646.76/x
3. Step 3: Cross multiply
   12,411.16x = 18,615.83 × 3,646.76
4. Step 4: Simplify right side
   12,411.16x = 67,887,352.90
5. Step 5: Solve for x
   x = 67,887,352.90/12,411.16
6. Step 6: Final answer
   x = 5,469.86