Finding the Fourth Proportional to 1,040.52, 1,560.78 and 271.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.52 : 1,560.78 = 271.02 : x
2. Step 2: Convert to fraction form
   1,040.52/1,560.78 = 271.02/x
3. Step 3: Cross multiply
   1,040.52x = 1,560.78 × 271.02
4. Step 4: Simplify right side
   1,040.52x = 423,002.60
5. Step 5: Solve for x
   x = 423,002.60/1,040.52
6. Step 6: Final answer
   x = 406.53