Finding the Fourth Proportional to 1,383.98, 2,072.81 and 834.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.98 : 2,072.81 = 834.99 : x
2. Step 2: Convert to fraction form
   1,383.98/2,072.81 = 834.99/x
3. Step 3: Cross multiply
   1,383.98x = 2,072.81 × 834.99
4. Step 4: Simplify right side
   1,383.98x = 1,730,771.45
5. Step 5: Solve for x
   x = 1,730,771.45/1,383.98
6. Step 6: Final answer
   x = 1,250.58