Finding the Fourth Proportional to 2,139.50, 2,952.56 and 1,208

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.50 : 2,952.56 = 1,208 : x
2. Step 2: Convert to fraction form
   2,139.50/2,952.56 = 1,208/x
3. Step 3: Cross multiply
   2,139.50x = 2,952.56 × 1,208
4. Step 4: Simplify right side
   2,139.50x = 3,566,692.48
5. Step 5: Solve for x
   x = 3,566,692.48/2,139.50
6. Step 6: Final answer
   x = 1,667.07