Finding the Fourth Proportional to 21,942.72, 30,268.64 and 13,448.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,942.72 : 30,268.64 = 13,448.96 : x
2. Step 2: Convert to fraction form
   21,942.72/30,268.64 = 13,448.96/x
3. Step 3: Cross multiply
   21,942.72x = 30,268.64 × 13,448.96
4. Step 4: Simplify right side
   21,942.72x = 407,081,728.61
5. Step 5: Solve for x
   x = 407,081,728.61/21,942.72
6. Step 6: Final answer
   x = 18,552.02