Finding the Fourth Proportional to 22,909.98, 31,616.56 and 21,860.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,909.98 : 31,616.56 = 21,860.22 : x
2. Step 2: Convert to fraction form
   22,909.98/31,616.56 = 21,860.22/x
3. Step 3: Cross multiply
   22,909.98x = 31,616.56 × 21,860.22
4. Step 4: Simplify right side
   22,909.98x = 691,144,957.24
5. Step 5: Solve for x
   x = 691,144,957.24/22,909.98
6. Step 6: Final answer
   x = 30,167.86