Finding the Fourth Proportional to 2,131.67, 3,199.32 and 834.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.67 : 3,199.32 = 834.05 : x
2. Step 2: Convert to fraction form
   2,131.67/3,199.32 = 834.05/x
3. Step 3: Cross multiply
   2,131.67x = 3,199.32 × 834.05
4. Step 4: Simplify right side
   2,131.67x = 2,668,376.85
5. Step 5: Solve for x
   x = 2,668,376.85/2,131.67
6. Step 6: Final answer
   x = 1,251.78