Finding the Fourth Proportional to 3,944.78, 5,912.69 and 1,992.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,944.78 : 5,912.69 = 1,992.86 : x
2. Step 2: Convert to fraction form
   3,944.78/5,912.69 = 1,992.86/x
3. Step 3: Cross multiply
   3,944.78x = 5,912.69 × 1,992.86
4. Step 4: Simplify right side
   3,944.78x = 11,783,123.87
5. Step 5: Solve for x
   x = 11,783,123.87/3,944.78
6. Step 6: Final answer
   x = 2,987.02