Finding the Fourth Proportional to 142,145.51, 196,160.72 and 81,727.97

Step by Step Solution

1. Step 1: Write the proportion equation
   142,145.51 : 196,160.72 = 81,727.97 : x
2. Step 2: Convert to fraction form
   142,145.51/196,160.72 = 81,727.97/x
3. Step 3: Cross multiply
   142,145.51x = 196,160.72 × 81,727.97
4. Step 4: Simplify right side
   142,145.51x = 16,031,816,049.90
5. Step 5: Solve for x
   x = 16,031,816,049.90/142,145.51
6. Step 6: Final answer
   x = 112,784.54