Finding the Fourth Proportional to 8,646.82, 12,960.51 and 3,718.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,646.82 : 12,960.51 = 3,718.78 : x
2. Step 2: Convert to fraction form
   8,646.82/12,960.51 = 3,718.78/x
3. Step 3: Cross multiply
   8,646.82x = 12,960.51 × 3,718.78
4. Step 4: Simplify right side
   8,646.82x = 48,197,285.38
5. Step 5: Solve for x
   x = 48,197,285.38/8,646.82
6. Step 6: Final answer
   x = 5,573.99