Finding the Fourth Proportional to 2,998.42, 4,498.27 and 918.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,998.42 : 4,498.27 = 918.56 : x
2. Step 2: Convert to fraction form
   2,998.42/4,498.27 = 918.56/x
3. Step 3: Cross multiply
   2,998.42x = 4,498.27 × 918.56
4. Step 4: Simplify right side
   2,998.42x = 4,131,939.84
5. Step 5: Solve for x
   x = 4,131,939.84/2,998.42
6. Step 6: Final answer
   x = 1,378.04