Finding the Fourth Proportional to 2,178.78, 3,273.03 and 1,692.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.78 : 3,273.03 = 1,692.78 : x
2. Step 2: Convert to fraction form
   2,178.78/3,273.03 = 1,692.78/x
3. Step 3: Cross multiply
   2,178.78x = 3,273.03 × 1,692.78
4. Step 4: Simplify right side
   2,178.78x = 5,540,519.72
5. Step 5: Solve for x
   x = 5,540,519.72/2,178.78
6. Step 6: Final answer
   x = 2,542.95