Finding the Fourth Proportional to 6,260.28, 8,638.56 and 3,607.80

Step by Step Solution

1. Step 1: Write the proportion equation
   6,260.28 : 8,638.56 = 3,607.80 : x
2. Step 2: Convert to fraction form
   6,260.28/8,638.56 = 3,607.80/x
3. Step 3: Cross multiply
   6,260.28x = 8,638.56 × 3,607.80
4. Step 4: Simplify right side
   6,260.28x = 31,166,196.77
5. Step 5: Solve for x
   x = 31,166,196.77/6,260.28
6. Step 6: Final answer
   x = 4,978.40