Finding the Fourth Proportional to 1,349.38, 1,862.23 and 818.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,349.38 : 1,862.23 = 818.31 : x
2. Step 2: Convert to fraction form
   1,349.38/1,862.23 = 818.31/x
3. Step 3: Cross multiply
   1,349.38x = 1,862.23 × 818.31
4. Step 4: Simplify right side
   1,349.38x = 1,523,874.73
5. Step 5: Solve for x
   x = 1,523,874.73/1,349.38
6. Step 6: Final answer
   x = 1,129.31