Finding the Fourth Proportional to 142,162.93, 196,218.50 and 81,768.47

Step by Step Solution

1. Step 1: Write the proportion equation
   142,162.93 : 196,218.50 = 81,768.47 : x
2. Step 2: Convert to fraction form
   142,162.93/196,218.50 = 81,768.47/x
3. Step 3: Cross multiply
   142,162.93x = 196,218.50 × 81,768.47
4. Step 4: Simplify right side
   142,162.93x = 16,044,485,876.58
5. Step 5: Solve for x
   x = 16,044,485,876.58/142,162.93
6. Step 6: Final answer
   x = 112,859.84