Finding the Fourth Proportional to 32,871.75, 45,359.41 and 20,128.15

Step by Step Solution

1. Step 1: Write the proportion equation
   32,871.75 : 45,359.41 = 20,128.15 : x
2. Step 2: Convert to fraction form
   32,871.75/45,359.41 = 20,128.15/x
3. Step 3: Cross multiply
   32,871.75x = 45,359.41 × 20,128.15
4. Step 4: Simplify right side
   32,871.75x = 913,000,712.45
5. Step 5: Solve for x
   x = 913,000,712.45/32,871.75
6. Step 6: Final answer
   x = 27,774.63