Finding the Fourth Proportional to 21,223.48, 29,298.79 and 13,268.27

Step by Step Solution

1. Step 1: Write the proportion equation
   21,223.48 : 29,298.79 = 13,268.27 : x
2. Step 2: Convert to fraction form
   21,223.48/29,298.79 = 13,268.27/x
3. Step 3: Cross multiply
   21,223.48x = 29,298.79 × 13,268.27
4. Step 4: Simplify right side
   21,223.48x = 388,744,256.39
5. Step 5: Solve for x
   x = 388,744,256.39/21,223.48
6. Step 6: Final answer
   x = 18,316.71