Finding the Fourth Proportional to 10,839.78, 14,958.90 and 5,871.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,839.78 : 14,958.90 = 5,871.78 : x
2. Step 2: Convert to fraction form
   10,839.78/14,958.90 = 5,871.78/x
3. Step 3: Cross multiply
   10,839.78x = 14,958.90 × 5,871.78
4. Step 4: Simplify right side
   10,839.78x = 87,835,369.84
5. Step 5: Solve for x
   x = 87,835,369.84/10,839.78
6. Step 6: Final answer
   x = 8,103.06