Finding the Fourth Proportional to 2,556.31, 3,834.50 and 912.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.31 : 3,834.50 = 912.95 : x
2. Step 2: Convert to fraction form
   2,556.31/3,834.50 = 912.95/x
3. Step 3: Cross multiply
   2,556.31x = 3,834.50 × 912.95
4. Step 4: Simplify right side
   2,556.31x = 3,500,711.80
5. Step 5: Solve for x
   x = 3,500,711.80/2,556.31
6. Step 6: Final answer
   x = 1,369.44