Finding the Fourth Proportional to 6,128.32, 8,451.20 and 4,116.28

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.32 : 8,451.20 = 4,116.28 : x
2. Step 2: Convert to fraction form
   6,128.32/8,451.20 = 4,116.28/x
3. Step 3: Cross multiply
   6,128.32x = 8,451.20 × 4,116.28
4. Step 4: Simplify right side
   6,128.32x = 34,787,505.54
5. Step 5: Solve for x
   x = 34,787,505.54/6,128.32
6. Step 6: Final answer
   x = 5,676.52