Finding the Fourth Proportional to 2,672.82, 4,009.56 and 918.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.82 : 4,009.56 = 918.18 : x
2. Step 2: Convert to fraction form
   2,672.82/4,009.56 = 918.18/x
3. Step 3: Cross multiply
   2,672.82x = 4,009.56 × 918.18
4. Step 4: Simplify right side
   2,672.82x = 3,681,497.80
5. Step 5: Solve for x
   x = 3,681,497.80/2,672.82
6. Step 6: Final answer
   x = 1,377.38