Finding the Fourth Proportional to 3,659.31, 5,049.84 and 1,980.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,659.31 : 5,049.84 = 1,980.75 : x
2. Step 2: Convert to fraction form
   3,659.31/5,049.84 = 1,980.75/x
3. Step 3: Cross multiply
   3,659.31x = 5,049.84 × 1,980.75
4. Step 4: Simplify right side
   3,659.31x = 10,002,496.94
5. Step 5: Solve for x
   x = 10,002,496.94/3,659.31
6. Step 6: Final answer
   x = 2,733.43