Finding the Fourth Proportional to 7,311.49, 10,089.83 and 3,954.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,311.49 : 10,089.83 = 3,954.31 : x
2. Step 2: Convert to fraction form
   7,311.49/10,089.83 = 3,954.31/x
3. Step 3: Cross multiply
   7,311.49x = 10,089.83 × 3,954.31
4. Step 4: Simplify right side
   7,311.49x = 39,898,315.67
5. Step 5: Solve for x
   x = 39,898,315.67/7,311.49
6. Step 6: Final answer
   x = 5,456.93