Finding the Fourth Proportional to 6,434.80, 8,880.37 and 3,916.51

Step by Step Solution

1. Step 1: Write the proportion equation
   6,434.80 : 8,880.37 = 3,916.51 : x
2. Step 2: Convert to fraction form
   6,434.80/8,880.37 = 3,916.51/x
3. Step 3: Cross multiply
   6,434.80x = 8,880.37 × 3,916.51
4. Step 4: Simplify right side
   6,434.80x = 34,780,025.92
5. Step 5: Solve for x
   x = 34,780,025.92/6,434.80
6. Step 6: Final answer
   x = 5,404.99