Finding the Fourth Proportional to 3,937.91, 5,912.31 and 2,089.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,937.91 : 5,912.31 = 2,089.89 : x
2. Step 2: Convert to fraction form
   3,937.91/5,912.31 = 2,089.89/x
3. Step 3: Cross multiply
   3,937.91x = 5,912.31 × 2,089.89
4. Step 4: Simplify right side
   3,937.91x = 12,356,077.55
5. Step 5: Solve for x
   x = 12,356,077.55/3,937.91
6. Step 6: Final answer
   x = 3,137.73