Finding the Fourth Proportional to 2,661.28, 3,672.54 and 1,542.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.28 : 3,672.54 = 1,542.20 : x
2. Step 2: Convert to fraction form
   2,661.28/3,672.54 = 1,542.20/x
3. Step 3: Cross multiply
   2,661.28x = 3,672.54 × 1,542.20
4. Step 4: Simplify right side
   2,661.28x = 5,663,772.83
5. Step 5: Solve for x
   x = 5,663,772.83/2,661.28
6. Step 6: Final answer
   x = 2,128.22