Finding the Fourth Proportional to 1,145.50, 1,716.83 and 414.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.50 : 1,716.83 = 414.27 : x
2. Step 2: Convert to fraction form
   1,145.50/1,716.83 = 414.27/x
3. Step 3: Cross multiply
   1,145.50x = 1,716.83 × 414.27
4. Step 4: Simplify right side
   1,145.50x = 711,231.16
5. Step 5: Solve for x
   x = 711,231.16/1,145.50
6. Step 6: Final answer
   x = 620.89