Finding the Fourth Proportional to 3,640.50, 5,023.89 and 1,984.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,640.50 : 5,023.89 = 1,984.50 : x
2. Step 2: Convert to fraction form
   3,640.50/5,023.89 = 1,984.50/x
3. Step 3: Cross multiply
   3,640.50x = 5,023.89 × 1,984.50
4. Step 4: Simplify right side
   3,640.50x = 9,969,909.71
5. Step 5: Solve for x
   x = 9,969,909.71/3,640.50
6. Step 6: Final answer
   x = 2,738.61