Finding the Fourth Proportional to 32,128.65, 48,185.56 and 12,140.28

Step by Step Solution

1. Step 1: Write the proportion equation
   32,128.65 : 48,185.56 = 12,140.28 : x
2. Step 2: Convert to fraction form
   32,128.65/48,185.56 = 12,140.28/x
3. Step 3: Cross multiply
   32,128.65x = 48,185.56 × 12,140.28
4. Step 4: Simplify right side
   32,128.65x = 584,986,171.39
5. Step 5: Solve for x
   x = 584,986,171.39/32,128.65
6. Step 6: Final answer
   x = 18,207.62