Finding the Fourth Proportional to 6,429.78, 8,869.50 and 3,776.63

Step by Step Solution

1. Step 1: Write the proportion equation
   6,429.78 : 8,869.50 = 3,776.63 : x
2. Step 2: Convert to fraction form
   6,429.78/8,869.50 = 3,776.63/x
3. Step 3: Cross multiply
   6,429.78x = 8,869.50 × 3,776.63
4. Step 4: Simplify right side
   6,429.78x = 33,496,775.44
5. Step 5: Solve for x
   x = 33,496,775.44/6,429.78
6. Step 6: Final answer
   x = 5,209.63