Finding the Fourth Proportional to 6,615.50, 9,128.81 and 3,631.32

Step by Step Solution

1. Step 1: Write the proportion equation
   6,615.50 : 9,128.81 = 3,631.32 : x
2. Step 2: Convert to fraction form
   6,615.50/9,128.81 = 3,631.32/x
3. Step 3: Cross multiply
   6,615.50x = 9,128.81 × 3,631.32
4. Step 4: Simplify right side
   6,615.50x = 33,149,639.41
5. Step 5: Solve for x
   x = 33,149,639.41/6,615.50
6. Step 6: Final answer
   x = 5,010.91