Finding the Fourth Proportional to 12,760.50, 19,142.91 and 3,993.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,760.50 : 19,142.91 = 3,993.69 : x
2. Step 2: Convert to fraction form
   12,760.50/19,142.91 = 3,993.69/x
3. Step 3: Cross multiply
   12,760.50x = 19,142.91 × 3,993.69
4. Step 4: Simplify right side
   12,760.50x = 76,450,848.24
5. Step 5: Solve for x
   x = 76,450,848.24/12,760.50
6. Step 6: Final answer
   x = 5,991.21