Finding the Fourth Proportional to 6,417.31, 8,853.25 and 3,899.01

Step by Step Solution

1. Step 1: Write the proportion equation
   6,417.31 : 8,853.25 = 3,899.01 : x
2. Step 2: Convert to fraction form
   6,417.31/8,853.25 = 3,899.01/x
3. Step 3: Cross multiply
   6,417.31x = 8,853.25 × 3,899.01
4. Step 4: Simplify right side
   6,417.31x = 34,518,916.15
5. Step 5: Solve for x
   x = 34,518,916.15/6,417.31
6. Step 6: Final answer
   x = 5,379.03