Finding the Fourth Proportional to 2,250, 3,105 and 1,318.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,250 : 3,105 = 1,318.50 : x
2. Step 2: Convert to fraction form
   2,250/3,105 = 1,318.50/x
3. Step 3: Cross multiply
   2,250x = 3,105 × 1,318.50
4. Step 4: Simplify right side
   2,250x = 4,093,942.50
5. Step 5: Solve for x
   x = 4,093,942.50/2,250
6. Step 6: Final answer
   x = 1,819.53