Finding the Fourth Proportional to 3,105.78, 4,658.61 and 914.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.78 : 4,658.61 = 914.46 : x
2. Step 2: Convert to fraction form
   3,105.78/4,658.61 = 914.46/x
3. Step 3: Cross multiply
   3,105.78x = 4,658.61 × 914.46
4. Step 4: Simplify right side
   3,105.78x = 4,260,112.50
5. Step 5: Solve for x
   x = 4,260,112.50/3,105.78
6. Step 6: Final answer
   x = 1,371.67