Finding the Fourth Proportional to 2,556.42, 3,836.18 and 912.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.42 : 3,836.18 = 912.84 : x
2. Step 2: Convert to fraction form
   2,556.42/3,836.18 = 912.84/x
3. Step 3: Cross multiply
   2,556.42x = 3,836.18 × 912.84
4. Step 4: Simplify right side
   2,556.42x = 3,501,818.55
5. Step 5: Solve for x
   x = 3,501,818.55/2,556.42
6. Step 6: Final answer
   x = 1,369.81