Finding the Fourth Proportional to 6,439.30, 8,885.50 and 3,921.52

Step by Step Solution

1. Step 1: Write the proportion equation
   6,439.30 : 8,885.50 = 3,921.52 : x
2. Step 2: Convert to fraction form
   6,439.30/8,885.50 = 3,921.52/x
3. Step 3: Cross multiply
   6,439.30x = 8,885.50 × 3,921.52
4. Step 4: Simplify right side
   6,439.30x = 34,844,665.96
5. Step 5: Solve for x
   x = 34,844,665.96/6,439.30
6. Step 6: Final answer
   x = 5,411.25