Finding the Fourth Proportional to 21,860.76, 30,142.89 and 17,968.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,860.76 : 30,142.89 = 17,968.98 : x
2. Step 2: Convert to fraction form
   21,860.76/30,142.89 = 17,968.98/x
3. Step 3: Cross multiply
   21,860.76x = 30,142.89 × 17,968.98
4. Step 4: Simplify right side
   21,860.76x = 541,636,987.55
5. Step 5: Solve for x
   x = 541,636,987.55/21,860.76
6. Step 6: Final answer
   x = 24,776.68