Finding the Fourth Proportional to 12,760.72, 19,133.88 and 3,993.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,760.72 : 19,133.88 = 3,993.28 : x
2. Step 2: Convert to fraction form
   12,760.72/19,133.88 = 3,993.28/x
3. Step 3: Cross multiply
   12,760.72x = 19,133.88 × 3,993.28
4. Step 4: Simplify right side
   12,760.72x = 76,406,940.33
5. Step 5: Solve for x
   x = 76,406,940.33/12,760.72
6. Step 6: Final answer
   x = 5,987.67