Finding the Fourth Proportional to 6,275.30, 8,660.31 and 3,480.80

Step by Step Solution

1. Step 1: Write the proportion equation
   6,275.30 : 8,660.31 = 3,480.80 : x
2. Step 2: Convert to fraction form
   6,275.30/8,660.31 = 3,480.80/x
3. Step 3: Cross multiply
   6,275.30x = 8,660.31 × 3,480.80
4. Step 4: Simplify right side
   6,275.30x = 30,144,807.05
5. Step 5: Solve for x
   x = 30,144,807.05/6,275.30
6. Step 6: Final answer
   x = 4,803.72