Finding the Fourth Proportional to 1,510.97, 2,270.52 and 818.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.97 : 2,270.52 = 818.15 : x
2. Step 2: Convert to fraction form
   1,510.97/2,270.52 = 818.15/x
3. Step 3: Cross multiply
   1,510.97x = 2,270.52 × 818.15
4. Step 4: Simplify right side
   1,510.97x = 1,857,614.59
5. Step 5: Solve for x
   x = 1,857,614.59/1,510.97
6. Step 6: Final answer
   x = 1,229.42