Finding the Fourth Proportional to 2,938.78, 4,402.41 and 1,291.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,938.78 : 4,402.41 = 1,291.42 : x
2. Step 2: Convert to fraction form
   2,938.78/4,402.41 = 1,291.42/x
3. Step 3: Cross multiply
   2,938.78x = 4,402.41 × 1,291.42
4. Step 4: Simplify right side
   2,938.78x = 5,685,360.32
5. Step 5: Solve for x
   x = 5,685,360.32/2,938.78
6. Step 6: Final answer
   x = 1,934.60