Finding the Fourth Proportional to 6,115.89, 8,439.98 and 3,321.39

Step by Step Solution

1. Step 1: Write the proportion equation
   6,115.89 : 8,439.98 = 3,321.39 : x
2. Step 2: Convert to fraction form
   6,115.89/8,439.98 = 3,321.39/x
3. Step 3: Cross multiply
   6,115.89x = 8,439.98 × 3,321.39
4. Step 4: Simplify right side
   6,115.89x = 28,032,448.57
5. Step 5: Solve for x
   x = 28,032,448.57/6,115.89
6. Step 6: Final answer
   x = 4,583.54