Finding the Fourth Proportional to 19,722.16, 27,216.54 and 12,648.56

Step by Step Solution

1. Step 1: Write the proportion equation
   19,722.16 : 27,216.54 = 12,648.56 : x
2. Step 2: Convert to fraction form
   19,722.16/27,216.54 = 12,648.56/x
3. Step 3: Cross multiply
   19,722.16x = 27,216.54 × 12,648.56
4. Step 4: Simplify right side
   19,722.16x = 344,250,107.22
5. Step 5: Solve for x
   x = 344,250,107.22/19,722.16
6. Step 6: Final answer
   x = 17,454.99