Finding the Fourth Proportional to 21,168.16, 31,766.82 and 7,317.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,168.16 : 31,766.82 = 7,317.16 : x
2. Step 2: Convert to fraction form
   21,168.16/31,766.82 = 7,317.16/x
3. Step 3: Cross multiply
   21,168.16x = 31,766.82 × 7,317.16
4. Step 4: Simplify right side
   21,168.16x = 232,442,797.77
5. Step 5: Solve for x
   x = 232,442,797.77/21,168.16
6. Step 6: Final answer
   x = 10,980.78