Finding the Fourth Proportional to 3,659.09, 5,049.55 and 1,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,659.09 : 5,049.55 = 1,980.50 : x
2. Step 2: Convert to fraction form
   3,659.09/5,049.55 = 1,980.50/x
3. Step 3: Cross multiply
   3,659.09x = 5,049.55 × 1,980.50
4. Step 4: Simplify right side
   3,659.09x = 10,000,641.45
5. Step 5: Solve for x
   x = 10,000,641.45/3,659.09
6. Step 6: Final answer
   x = 2,733.09