Finding the Fourth Proportional to 21,769.32, 30,038.98 and 13,268.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,769.32 : 30,038.98 = 13,268.37 : x
2. Step 2: Convert to fraction form
   21,769.32/30,038.98 = 13,268.37/x
3. Step 3: Cross multiply
   21,769.32x = 30,038.98 × 13,268.37
4. Step 4: Simplify right side
   21,769.32x = 398,568,301.06
5. Step 5: Solve for x
   x = 398,568,301.06/21,769.32
6. Step 6: Final answer
   x = 18,308.72