Finding the Fourth Proportional to 2,485.80, 3,728.18 and 754.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.80 : 3,728.18 = 754.28 : x
2. Step 2: Convert to fraction form
   2,485.80/3,728.18 = 754.28/x
3. Step 3: Cross multiply
   2,485.80x = 3,728.18 × 754.28
4. Step 4: Simplify right side
   2,485.80x = 2,812,091.61
5. Step 5: Solve for x
   x = 2,812,091.61/2,485.80
6. Step 6: Final answer
   x = 1,131.26