Finding the Fourth Proportional to 842.20, 1,162.56 and 754.72

Step by Step Solution

1. Step 1: Write the proportion equation
   842.20 : 1,162.56 = 754.72 : x
2. Step 2: Convert to fraction form
   842.20/1,162.56 = 754.72/x
3. Step 3: Cross multiply
   842.20x = 1,162.56 × 754.72
4. Step 4: Simplify right side
   842.20x = 877,407.28
5. Step 5: Solve for x
   x = 877,407.28/842.20
6. Step 6: Final answer
   x = 1,041.80