Finding the Fourth Proportional to 2,558.28, 3,836.86 and 914.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.28 : 3,836.86 = 914.94 : x
2. Step 2: Convert to fraction form
   2,558.28/3,836.86 = 914.94/x
3. Step 3: Cross multiply
   2,558.28x = 3,836.86 × 914.94
4. Step 4: Simplify right side
   2,558.28x = 3,510,496.69
5. Step 5: Solve for x
   x = 3,510,496.69/2,558.28
6. Step 6: Final answer
   x = 1,372.21