Finding the Fourth Proportional to 2,800.78, 3,865.02 and 1,753.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,800.78 : 3,865.02 = 1,753.42 : x
2. Step 2: Convert to fraction form
   2,800.78/3,865.02 = 1,753.42/x
3. Step 3: Cross multiply
   2,800.78x = 3,865.02 × 1,753.42
4. Step 4: Simplify right side
   2,800.78x = 6,777,003.37
5. Step 5: Solve for x
   x = 6,777,003.37/2,800.78
6. Step 6: Final answer
   x = 2,419.68