Finding the Fourth Proportional to 1,510.50, 2,262.99 and 816.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.50 : 2,262.99 = 816.15 : x
2. Step 2: Convert to fraction form
   1,510.50/2,262.99 = 816.15/x
3. Step 3: Cross multiply
   1,510.50x = 2,262.99 × 816.15
4. Step 4: Simplify right side
   1,510.50x = 1,846,939.29
5. Step 5: Solve for x
   x = 1,846,939.29/1,510.50
6. Step 6: Final answer
   x = 1,222.73