Finding the Fourth Proportional to 21,349, 29,461.56 and 12,401.68

Step by Step Solution

1. Step 1: Write the proportion equation
   21,349 : 29,461.56 = 12,401.68 : x
2. Step 2: Convert to fraction form
   21,349/29,461.56 = 12,401.68/x
3. Step 3: Cross multiply
   21,349x = 29,461.56 × 12,401.68
4. Step 4: Simplify right side
   21,349x = 365,372,839.42
5. Step 5: Solve for x
   x = 365,372,839.42/21,349
6. Step 6: Final answer
   x = 17,114.28