Finding the Fourth Proportional to 3,659.16, 5,049.60 and 1,980.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,659.16 : 5,049.60 = 1,980.54 : x
2. Step 2: Convert to fraction form
   3,659.16/5,049.60 = 1,980.54/x
3. Step 3: Cross multiply
   3,659.16x = 5,049.60 × 1,980.54
4. Step 4: Simplify right side
   3,659.16x = 10,000,934.78
5. Step 5: Solve for x
   x = 10,000,934.78/3,659.16
6. Step 6: Final answer
   x = 2,733.12