Finding the Fourth Proportional to 1,272.69, 1,756.31 and 748.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272.69 : 1,756.31 = 748.72 : x
2. Step 2: Convert to fraction form
   1,272.69/1,756.31 = 748.72/x
3. Step 3: Cross multiply
   1,272.69x = 1,756.31 × 748.72
4. Step 4: Simplify right side
   1,272.69x = 1,314,984.42
5. Step 5: Solve for x
   x = 1,314,984.42/1,272.69
6. Step 6: Final answer
   x = 1,033.23