Finding the Fourth Proportional to 2,556.62, 3,835.34 and 912.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.62 : 3,835.34 = 912.72 : x
2. Step 2: Convert to fraction form
   2,556.62/3,835.34 = 912.72/x
3. Step 3: Cross multiply
   2,556.62x = 3,835.34 × 912.72
4. Step 4: Simplify right side
   2,556.62x = 3,500,591.52
5. Step 5: Solve for x
   x = 3,500,591.52/2,556.62
6. Step 6: Final answer
   x = 1,369.23