Finding the Fourth Proportional to 940.88, 1,405.58 and 748.72

Step by Step Solution

1. Step 1: Write the proportion equation
   940.88 : 1,405.58 = 748.72 : x
2. Step 2: Convert to fraction form
   940.88/1,405.58 = 748.72/x
3. Step 3: Cross multiply
   940.88x = 1,405.58 × 748.72
4. Step 4: Simplify right side
   940.88x = 1,052,385.86
5. Step 5: Solve for x
   x = 1,052,385.86/940.88
6. Step 6: Final answer
   x = 1,118.51