Finding the Fourth Proportional to 20,778.97, 31,308.72 and 17,162.22

Step by Step Solution

1. Step 1: Write the proportion equation
   20,778.97 : 31,308.72 = 17,162.22 : x
2. Step 2: Convert to fraction form
   20,778.97/31,308.72 = 17,162.22/x
3. Step 3: Cross multiply
   20,778.97x = 31,308.72 × 17,162.22
4. Step 4: Simplify right side
   20,778.97x = 537,327,140.56
5. Step 5: Solve for x
   x = 537,327,140.56/20,778.97
6. Step 6: Final answer
   x = 25,859.18