Finding the Fourth Proportional to 6,128.40, 8,456.02 and 4,237.05

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.40 : 8,456.02 = 4,237.05 : x
2. Step 2: Convert to fraction form
   6,128.40/8,456.02 = 4,237.05/x
3. Step 3: Cross multiply
   6,128.40x = 8,456.02 × 4,237.05
4. Step 4: Simplify right side
   6,128.40x = 35,828,579.54
5. Step 5: Solve for x
   x = 35,828,579.54/6,128.40
6. Step 6: Final answer
   x = 5,846.32