Finding the Fourth Proportional to 2,485.48, 3,728.86 and 754.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.48 : 3,728.86 = 754.12 : x
2. Step 2: Convert to fraction form
   2,485.48/3,728.86 = 754.12/x
3. Step 3: Cross multiply
   2,485.48x = 3,728.86 × 754.12
4. Step 4: Simplify right side
   2,485.48x = 2,812,007.90
5. Step 5: Solve for x
   x = 2,812,007.90/2,485.48
6. Step 6: Final answer
   x = 1,131.37