Finding the Fourth Proportional to 2,861.38, 4,291.71 and 913.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,861.38 : 4,291.71 = 913.42 : x
2. Step 2: Convert to fraction form
   2,861.38/4,291.71 = 913.42/x
3. Step 3: Cross multiply
   2,861.38x = 4,291.71 × 913.42
4. Step 4: Simplify right side
   2,861.38x = 3,920,133.75
5. Step 5: Solve for x
   x = 3,920,133.75/2,861.38
6. Step 6: Final answer
   x = 1,370.02