Finding the Fourth Proportional to 2,805.50, 4,210.05 and 1,266.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,805.50 : 4,210.05 = 1,266.50 : x
2. Step 2: Convert to fraction form
   2,805.50/4,210.05 = 1,266.50/x
3. Step 3: Cross multiply
   2,805.50x = 4,210.05 × 1,266.50
4. Step 4: Simplify right side
   2,805.50x = 5,332,028.33
5. Step 5: Solve for x
   x = 5,332,028.33/2,805.50
6. Step 6: Final answer
   x = 1,900.56