Finding the Fourth Proportional to 3,668.12, 5,061.96 and 1,989.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,668.12 : 5,061.96 = 1,989.50 : x
2. Step 2: Convert to fraction form
   3,668.12/5,061.96 = 1,989.50/x
3. Step 3: Cross multiply
   3,668.12x = 5,061.96 × 1,989.50
4. Step 4: Simplify right side
   3,668.12x = 10,070,769.42
5. Step 5: Solve for x
   x = 10,070,769.42/3,668.12
6. Step 6: Final answer
   x = 2,745.49