Finding the Fourth Proportional to 2,485, 3,728.52 and 1,097.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485 : 3,728.52 = 1,097.60 : x
2. Step 2: Convert to fraction form
   2,485/3,728.52 = 1,097.60/x
3. Step 3: Cross multiply
   2,485x = 3,728.52 × 1,097.60
4. Step 4: Simplify right side
   2,485x = 4,092,423.55
5. Step 5: Solve for x
   x = 4,092,423.55/2,485
6. Step 6: Final answer
   x = 1,646.85