Finding the Fourth Proportional to 1,227.29, 1,692.77 and 1,108.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227.29 : 1,692.77 = 1,108.49 : x
2. Step 2: Convert to fraction form
   1,227.29/1,692.77 = 1,108.49/x
3. Step 3: Cross multiply
   1,227.29x = 1,692.77 × 1,108.49
4. Step 4: Simplify right side
   1,227.29x = 1,876,404.61
5. Step 5: Solve for x
   x = 1,876,404.61/1,227.29
6. Step 6: Final answer
   x = 1,528.91