Finding the Fourth Proportional to 1,362.42, 2,049.82 and 815.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.42 : 2,049.82 = 815.02 : x
2. Step 2: Convert to fraction form
   1,362.42/2,049.82 = 815.02/x
3. Step 3: Cross multiply
   1,362.42x = 2,049.82 × 815.02
4. Step 4: Simplify right side
   1,362.42x = 1,670,637.13
5. Step 5: Solve for x
   x = 1,670,637.13/1,362.42
6. Step 6: Final answer
   x = 1,226.23