Finding the Fourth Proportional to 6,339.29, 8,749.04 and 3,918.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,339.29 : 8,749.04 = 3,918.15 : x
2. Step 2: Convert to fraction form
   6,339.29/8,749.04 = 3,918.15/x
3. Step 3: Cross multiply
   6,339.29x = 8,749.04 × 3,918.15
4. Step 4: Simplify right side
   6,339.29x = 34,280,017.90
5. Step 5: Solve for x
   x = 34,280,017.90/6,339.29
6. Step 6: Final answer
   x = 5,407.55