Finding the Fourth Proportional to 1,223.49, 1,688.30 and 751.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223.49 : 1,688.30 = 751.42 : x
2. Step 2: Convert to fraction form
   1,223.49/1,688.30 = 751.42/x
3. Step 3: Cross multiply
   1,223.49x = 1,688.30 × 751.42
4. Step 4: Simplify right side
   1,223.49x = 1,268,613.00
5. Step 5: Solve for x
   x = 1,268,613.00/1,223.49
6. Step 6: Final answer
   x = 1,036.88