Finding the Fourth Proportional to 19,682.43, 27,142.83 and 13,236.63

Step by Step Solution

1. Step 1: Write the proportion equation
   19,682.43 : 27,142.83 = 13,236.63 : x
2. Step 2: Convert to fraction form
   19,682.43/27,142.83 = 13,236.63/x
3. Step 3: Cross multiply
   19,682.43x = 27,142.83 × 13,236.63
4. Step 4: Simplify right side
   19,682.43x = 359,279,597.86
5. Step 5: Solve for x
   x = 359,279,597.86/19,682.43
6. Step 6: Final answer
   x = 18,253.82