Finding the Fourth Proportional to 2,918.39, 4,377.56 and 1,274.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,918.39 : 4,377.56 = 1,274.72 : x
2. Step 2: Convert to fraction form
   2,918.39/4,377.56 = 1,274.72/x
3. Step 3: Cross multiply
   2,918.39x = 4,377.56 × 1,274.72
4. Step 4: Simplify right side
   2,918.39x = 5,580,135.02
5. Step 5: Solve for x
   x = 5,580,135.02/2,918.39
6. Step 6: Final answer
   x = 1,912.06