Finding the Fourth Proportional to 2,131.14, 3,199.72 and 1,208.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.14 : 3,199.72 = 1,208.50 : x
2. Step 2: Convert to fraction form
   2,131.14/3,199.72 = 1,208.50/x
3. Step 3: Cross multiply
   2,131.14x = 3,199.72 × 1,208.50
4. Step 4: Simplify right side
   2,131.14x = 3,866,861.62
5. Step 5: Solve for x
   x = 3,866,861.62/2,131.14
6. Step 6: Final answer
   x = 1,814.46