Finding the Fourth Proportional to 2,556.35, 3,834.96 and 912.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.35 : 3,834.96 = 912.86 : x
2. Step 2: Convert to fraction form
   2,556.35/3,834.96 = 912.86/x
3. Step 3: Cross multiply
   2,556.35x = 3,834.96 × 912.86
4. Step 4: Simplify right side
   2,556.35x = 3,500,781.59
5. Step 5: Solve for x
   x = 3,500,781.59/2,556.35
6. Step 6: Final answer
   x = 1,369.45