Finding the Fourth Proportional to 21,757.59, 30,030.91 and 13,369.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,757.59 : 30,030.91 = 13,369.23 : x
2. Step 2: Convert to fraction form
   21,757.59/30,030.91 = 13,369.23/x
3. Step 3: Cross multiply
   21,757.59x = 30,030.91 × 13,369.23
4. Step 4: Simplify right side
   21,757.59x = 401,490,109.48
5. Step 5: Solve for x
   x = 401,490,109.48/21,757.59
6. Step 6: Final answer
   x = 18,452.88