Finding the Fourth Proportional to 21,892.50, 30,211.68 and 12,461.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,892.50 : 30,211.68 = 12,461.06 : x
2. Step 2: Convert to fraction form
   21,892.50/30,211.68 = 12,461.06/x
3. Step 3: Cross multiply
   21,892.50x = 30,211.68 × 12,461.06
4. Step 4: Simplify right side
   21,892.50x = 376,469,679.44
5. Step 5: Solve for x
   x = 376,469,679.44/21,892.50
6. Step 6: Final answer
   x = 17,196.29