Finding the Fourth Proportional to 20,778.75, 31,168.73 and 5,196.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,778.75 : 31,168.73 = 5,196.38 : x
2. Step 2: Convert to fraction form
   20,778.75/31,168.73 = 5,196.38/x
3. Step 3: Cross multiply
   20,778.75x = 31,168.73 × 5,196.38
4. Step 4: Simplify right side
   20,778.75x = 161,964,422.34
5. Step 5: Solve for x
   x = 161,964,422.34/20,778.75
6. Step 6: Final answer
   x = 7,794.71