Finding the Fourth Proportional to 2,892.27, 4,338.56 and 918.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,892.27 : 4,338.56 = 918.05 : x
2. Step 2: Convert to fraction form
   2,892.27/4,338.56 = 918.05/x
3. Step 3: Cross multiply
   2,892.27x = 4,338.56 × 918.05
4. Step 4: Simplify right side
   2,892.27x = 3,982,998.58
5. Step 5: Solve for x
   x = 3,982,998.58/2,892.27
6. Step 6: Final answer
   x = 1,377.12