Finding the Fourth Proportional to 21,893.31, 30,213 and 12,461.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,893.31 : 30,213 = 12,461.94 : x
2. Step 2: Convert to fraction form
   21,893.31/30,213 = 12,461.94/x
3. Step 3: Cross multiply
   21,893.31x = 30,213 × 12,461.94
4. Step 4: Simplify right side
   21,893.31x = 376,512,593.22
5. Step 5: Solve for x
   x = 376,512,593.22/21,893.31
6. Step 6: Final answer
   x = 17,197.61