Finding the Fourth Proportional to 21,892.69, 30,211.94 and 12,461.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,892.69 : 30,211.94 = 12,461.25 : x
2. Step 2: Convert to fraction form
   21,892.69/30,211.94 = 12,461.25/x
3. Step 3: Cross multiply
   21,892.69x = 30,211.94 × 12,461.25
4. Step 4: Simplify right side
   21,892.69x = 376,478,568.48
5. Step 5: Solve for x
   x = 376,478,568.48/21,892.69
6. Step 6: Final answer
   x = 17,196.54