Finding the Fourth Proportional to 6,429.72, 8,874.44 and 3,911.29

Step by Step Solution

1. Step 1: Write the proportion equation
   6,429.72 : 8,874.44 = 3,911.29 : x
2. Step 2: Convert to fraction form
   6,429.72/8,874.44 = 3,911.29/x
3. Step 3: Cross multiply
   6,429.72x = 8,874.44 × 3,911.29
4. Step 4: Simplify right side
   6,429.72x = 34,710,508.43
5. Step 5: Solve for x
   x = 34,710,508.43/6,429.72
6. Step 6: Final answer
   x = 5,398.45