Finding the Fourth Proportional to 1,279.58, 1,765.83 and 748.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.58 : 1,765.83 = 748.34 : x
2. Step 2: Convert to fraction form
   1,279.58/1,765.83 = 748.34/x
3. Step 3: Cross multiply
   1,279.58x = 1,765.83 × 748.34
4. Step 4: Simplify right side
   1,279.58x = 1,321,441.22
5. Step 5: Solve for x
   x = 1,321,441.22/1,279.58
6. Step 6: Final answer
   x = 1,032.71