Finding the Fourth Proportional to 6,259.72, 8,638.38 and 3,607.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,259.72 : 8,638.38 = 3,607.12 : x
2. Step 2: Convert to fraction form
   6,259.72/8,638.38 = 3,607.12/x
3. Step 3: Cross multiply
   6,259.72x = 8,638.38 × 3,607.12
4. Step 4: Simplify right side
   6,259.72x = 31,159,673.27
5. Step 5: Solve for x
   x = 31,159,673.27/6,259.72
6. Step 6: Final answer
   x = 4,977.81