Finding the Fourth Proportional to 142,057.44, 196,050.72 and 81,637.92

Step by Step Solution

1. Step 1: Write the proportion equation
   142,057.44 : 196,050.72 = 81,637.92 : x
2. Step 2: Convert to fraction form
   142,057.44/196,050.72 = 81,637.92/x
3. Step 3: Cross multiply
   142,057.44x = 196,050.72 × 81,637.92
4. Step 4: Simplify right side
   142,057.44x = 16,005,172,995.30
5. Step 5: Solve for x
   x = 16,005,172,995.30/142,057.44
6. Step 6: Final answer
   x = 112,666.91