Finding the Fourth Proportional to 21,348.53, 29,463.56 and 12,396.03

Step by Step Solution

1. Step 1: Write the proportion equation
   21,348.53 : 29,463.56 = 12,396.03 : x
2. Step 2: Convert to fraction form
   21,348.53/29,463.56 = 12,396.03/x
3. Step 3: Cross multiply
   21,348.53x = 29,463.56 × 12,396.03
4. Step 4: Simplify right side
   21,348.53x = 365,231,173.67
5. Step 5: Solve for x
   x = 365,231,173.67/21,348.53
6. Step 6: Final answer
   x = 17,108.02