Finding the Fourth Proportional to 6,315.58, 8,715.24 and 3,959.02

Step by Step Solution

1. Step 1: Write the proportion equation
   6,315.58 : 8,715.24 = 3,959.02 : x
2. Step 2: Convert to fraction form
   6,315.58/8,715.24 = 3,959.02/x
3. Step 3: Cross multiply
   6,315.58x = 8,715.24 × 3,959.02
4. Step 4: Simplify right side
   6,315.58x = 34,503,809.46
5. Step 5: Solve for x
   x = 34,503,809.46/6,315.58
6. Step 6: Final answer
   x = 5,463.28