Finding the Fourth Proportional to 6,430.28, 8,872.83 and 3,778.54

Step by Step Solution

1. Step 1: Write the proportion equation
   6,430.28 : 8,872.83 = 3,778.54 : x
2. Step 2: Convert to fraction form
   6,430.28/8,872.83 = 3,778.54/x
3. Step 3: Cross multiply
   6,430.28x = 8,872.83 × 3,778.54
4. Step 4: Simplify right side
   6,430.28x = 33,526,320.89
5. Step 5: Solve for x
   x = 33,526,320.89/6,430.28
6. Step 6: Final answer
   x = 5,213.82