Finding the Fourth Proportional to 2,647.38, 3,971.27 and 892.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.38 : 3,971.27 = 892.38 : x
2. Step 2: Convert to fraction form
   2,647.38/3,971.27 = 892.38/x
3. Step 3: Cross multiply
   2,647.38x = 3,971.27 × 892.38
4. Step 4: Simplify right side
   2,647.38x = 3,543,899.05
5. Step 5: Solve for x
   x = 3,543,899.05/2,647.38
6. Step 6: Final answer
   x = 1,338.64