Finding the Fourth Proportional to 3,659.39, 5,049.98 and 1,980.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,659.39 : 5,049.98 = 1,980.80 : x
2. Step 2: Convert to fraction form
   3,659.39/5,049.98 = 1,980.80/x
3. Step 3: Cross multiply
   3,659.39x = 5,049.98 × 1,980.80
4. Step 4: Simplify right side
   3,659.39x = 10,003,003.10
5. Step 5: Solve for x
   x = 10,003,003.10/3,659.39
6. Step 6: Final answer
   x = 2,733.51