Finding the Fourth Proportional to 6,434.72, 8,880.56 and 3,916.24

Step by Step Solution

1. Step 1: Write the proportion equation
   6,434.72 : 8,880.56 = 3,916.24 : x
2. Step 2: Convert to fraction form
   6,434.72/8,880.56 = 3,916.24/x
3. Step 3: Cross multiply
   6,434.72x = 8,880.56 × 3,916.24
4. Step 4: Simplify right side
   6,434.72x = 34,778,404.29
5. Step 5: Solve for x
   x = 34,778,404.29/6,434.72
6. Step 6: Final answer
   x = 5,404.80