Finding the Fourth Proportional to 2,667.09, 4,000.83 and 911.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.09 : 4,000.83 = 911.39 : x
2. Step 2: Convert to fraction form
   2,667.09/4,000.83 = 911.39/x
3. Step 3: Cross multiply
   2,667.09x = 4,000.83 × 911.39
4. Step 4: Simplify right side
   2,667.09x = 3,646,316.45
5. Step 5: Solve for x
   x = 3,646,316.45/2,667.09
6. Step 6: Final answer
   x = 1,367.15