Finding the Fourth Proportional to 6,128.50, 8,454.91 and 4,003.36

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.50 : 8,454.91 = 4,003.36 : x
2. Step 2: Convert to fraction form
   6,128.50/8,454.91 = 4,003.36/x
3. Step 3: Cross multiply
   6,128.50x = 8,454.91 × 4,003.36
4. Step 4: Simplify right side
   6,128.50x = 33,848,048.50
5. Step 5: Solve for x
   x = 33,848,048.50/6,128.50
6. Step 6: Final answer
   x = 5,523.06