Finding the Fourth Proportional to 6,443.16, 8,890.47 and 3,924.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,443.16 : 8,890.47 = 3,924.42 : x
2. Step 2: Convert to fraction form
   6,443.16/8,890.47 = 3,924.42/x
3. Step 3: Cross multiply
   6,443.16x = 8,890.47 × 3,924.42
4. Step 4: Simplify right side
   6,443.16x = 34,889,938.28
5. Step 5: Solve for x
   x = 34,889,938.28/6,443.16
6. Step 6: Final answer
   x = 5,415.04