Finding the Fourth Proportional to 1,034.38, 1,550.04 and 815.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.38 : 1,550.04 = 815.53 : x
2. Step 2: Convert to fraction form
   1,034.38/1,550.04 = 815.53/x
3. Step 3: Cross multiply
   1,034.38x = 1,550.04 × 815.53
4. Step 4: Simplify right side
   1,034.38x = 1,264,100.25
5. Step 5: Solve for x
   x = 1,264,100.25/1,034.38
6. Step 6: Final answer
   x = 1,222.09