Finding the Fourth Proportional to 2,918.42, 4,377.56 and 838.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,918.42 : 4,377.56 = 838.43 : x
2. Step 2: Convert to fraction form
   2,918.42/4,377.56 = 838.43/x
3. Step 3: Cross multiply
   2,918.42x = 4,377.56 × 838.43
4. Step 4: Simplify right side
   2,918.42x = 3,670,251.55
5. Step 5: Solve for x
   x = 3,670,251.55/2,918.42
6. Step 6: Final answer
   x = 1,257.62