Finding the Fourth Proportional to 6,429.33, 8,872.53 and 3,776.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,429.33 : 8,872.53 = 3,776.78 : x
2. Step 2: Convert to fraction form
   6,429.33/8,872.53 = 3,776.78/x
3. Step 3: Cross multiply
   6,429.33x = 8,872.53 × 3,776.78
4. Step 4: Simplify right side
   6,429.33x = 33,509,593.85
5. Step 5: Solve for x
   x = 33,509,593.85/6,429.33
6. Step 6: Final answer
   x = 5,211.99