Finding the Fourth Proportional to 3,939.37, 5,912.72 and 1,992.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939.37 : 5,912.72 = 1,992.94 : x
2. Step 2: Convert to fraction form
   3,939.37/5,912.72 = 1,992.94/x
3. Step 3: Cross multiply
   3,939.37x = 5,912.72 × 1,992.94
4. Step 4: Simplify right side
   3,939.37x = 11,783,696.20
5. Step 5: Solve for x
   x = 11,783,696.20/3,939.37
6. Step 6: Final answer
   x = 2,991.26