Finding the Fourth Proportional to 6,315.57, 8,715.78 and 3,663.81

Step by Step Solution

1. Step 1: Write the proportion equation
   6,315.57 : 8,715.78 = 3,663.81 : x
2. Step 2: Convert to fraction form
   6,315.57/8,715.78 = 3,663.81/x
3. Step 3: Cross multiply
   6,315.57x = 8,715.78 × 3,663.81
4. Step 4: Simplify right side
   6,315.57x = 31,932,961.92
5. Step 5: Solve for x
   x = 31,932,961.92/6,315.57
6. Step 6: Final answer
   x = 5,056.23