Finding the Fourth Proportional to 2,485.86, 3,728.88 and 754.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.86 : 3,728.88 = 754.50 : x
2. Step 2: Convert to fraction form
   2,485.86/3,728.88 = 754.50/x
3. Step 3: Cross multiply
   2,485.86x = 3,728.88 × 754.50
4. Step 4: Simplify right side
   2,485.86x = 2,813,439.96
5. Step 5: Solve for x
   x = 2,813,439.96/2,485.86
6. Step 6: Final answer
   x = 1,131.78