Finding the Fourth Proportional to 1,271.79, 1,754.34 and 747.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.79 : 1,754.34 = 747.72 : x
2. Step 2: Convert to fraction form
   1,271.79/1,754.34 = 747.72/x
3. Step 3: Cross multiply
   1,271.79x = 1,754.34 × 747.72
4. Step 4: Simplify right side
   1,271.79x = 1,311,755.10
5. Step 5: Solve for x
   x = 1,311,755.10/1,271.79
6. Step 6: Final answer
   x = 1,031.42