Finding the Fourth Proportional to 22,906.98, 31,612.41 and 21,857.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,906.98 : 31,612.41 = 21,857.22 : x
2. Step 2: Convert to fraction form
   22,906.98/31,612.41 = 21,857.22/x
3. Step 3: Cross multiply
   22,906.98x = 31,612.41 × 21,857.22
4. Step 4: Simplify right side
   22,906.98x = 690,959,400.10
5. Step 5: Solve for x
   x = 690,959,400.10/22,906.98
6. Step 6: Final answer
   x = 30,163.71