Finding the Fourth Proportional to 21,349.51, 29,463.50 and 12,399.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,349.51 : 29,463.50 = 12,399.82 : x
2. Step 2: Convert to fraction form
   21,349.51/29,463.50 = 12,399.82/x
3. Step 3: Cross multiply
   21,349.51x = 29,463.50 × 12,399.82
4. Step 4: Simplify right side
   21,349.51x = 365,342,096.57
5. Step 5: Solve for x
   x = 365,342,096.57/21,349.51
6. Step 6: Final answer
   x = 17,112.43