Finding the Fourth Proportional to 19,939.72, 27,494.34 and 12,760.24

Step by Step Solution

1. Step 1: Write the proportion equation
   19,939.72 : 27,494.34 = 12,760.24 : x
2. Step 2: Convert to fraction form
   19,939.72/27,494.34 = 12,760.24/x
3. Step 3: Cross multiply
   19,939.72x = 27,494.34 × 12,760.24
4. Step 4: Simplify right side
   19,939.72x = 350,834,377.04
5. Step 5: Solve for x
   x = 350,834,377.04/19,939.72
6. Step 6: Final answer
   x = 17,594.75