Finding the Fourth Proportional to 1,315.42, 1,814.83 and 748.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.42 : 1,814.83 = 748.20 : x
2. Step 2: Convert to fraction form
   1,315.42/1,814.83 = 748.20/x
3. Step 3: Cross multiply
   1,315.42x = 1,814.83 × 748.20
4. Step 4: Simplify right side
   1,315.42x = 1,357,844.38
5. Step 5: Solve for x
   x = 1,357,844.38/1,315.42
6. Step 6: Final answer
   x = 1,032.25