Finding the Fourth Proportional to 21,301.59, 29,389.95 and 13,752.39

Step by Step Solution

1. Step 1: Write the proportion equation
   21,301.59 : 29,389.95 = 13,752.39 : x
2. Step 2: Convert to fraction form
   21,301.59/29,389.95 = 13,752.39/x
3. Step 3: Cross multiply
   21,301.59x = 29,389.95 × 13,752.39
4. Step 4: Simplify right side
   21,301.59x = 404,182,054.48
5. Step 5: Solve for x
   x = 404,182,054.48/21,301.59
6. Step 6: Final answer
   x = 18,974.27