Finding the Fourth Proportional to 6,399.52, 8,832.72 and 3,916.96

Step by Step Solution

1. Step 1: Write the proportion equation
   6,399.52 : 8,832.72 = 3,916.96 : x
2. Step 2: Convert to fraction form
   6,399.52/8,832.72 = 3,916.96/x
3. Step 3: Cross multiply
   6,399.52x = 8,832.72 × 3,916.96
4. Step 4: Simplify right side
   6,399.52x = 34,597,410.93
5. Step 5: Solve for x
   x = 34,597,410.93/6,399.52
6. Step 6: Final answer
   x = 5,406.25