Finding the Fourth Proportional to 21,162.60, 31,700.82 and 13,744.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,162.60 : 31,700.82 = 13,744.56 : x
2. Step 2: Convert to fraction form
   21,162.60/31,700.82 = 13,744.56/x
3. Step 3: Cross multiply
   21,162.60x = 31,700.82 × 13,744.56
4. Step 4: Simplify right side
   21,162.60x = 435,713,822.54
5. Step 5: Solve for x
   x = 435,713,822.54/21,162.60
6. Step 6: Final answer
   x = 20,588.86