Finding the Fourth Proportional to 2,862.15, 4,293.54 and 913.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,862.15 : 4,293.54 = 913.89 : x
2. Step 2: Convert to fraction form
   2,862.15/4,293.54 = 913.89/x
3. Step 3: Cross multiply
   2,862.15x = 4,293.54 × 913.89
4. Step 4: Simplify right side
   2,862.15x = 3,923,823.27
5. Step 5: Solve for x
   x = 3,923,823.27/2,862.15
6. Step 6: Final answer
   x = 1,370.94