Finding the Fourth Proportional to 6,128.60, 8,456.16 and 4,007.22

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.60 : 8,456.16 = 4,007.22 : x
2. Step 2: Convert to fraction form
   6,128.60/8,456.16 = 4,007.22/x
3. Step 3: Cross multiply
   6,128.60x = 8,456.16 × 4,007.22
4. Step 4: Simplify right side
   6,128.60x = 33,885,693.48
5. Step 5: Solve for x
   x = 33,885,693.48/6,128.60
6. Step 6: Final answer
   x = 5,529.11