Finding the Fourth Proportional to 20,877.16, 31,317.22 and 8,397.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,877.16 : 31,317.22 = 8,397.25 : x
2. Step 2: Convert to fraction form
   20,877.16/31,317.22 = 8,397.25/x
3. Step 3: Cross multiply
   20,877.16x = 31,317.22 × 8,397.25
4. Step 4: Simplify right side
   20,877.16x = 262,978,525.65
5. Step 5: Solve for x
   x = 262,978,525.65/20,877.16
6. Step 6: Final answer
   x = 12,596.47