Finding the Fourth Proportional to 142,488, 196,631.28 and 101,727.36

Step by Step Solution

1. Step 1: Write the proportion equation
   142,488 : 196,631.28 = 101,727.36 : x
2. Step 2: Convert to fraction form
   142,488/196,631.28 = 101,727.36/x
3. Step 3: Cross multiply
   142,488x = 196,631.28 × 101,727.36
4. Step 4: Simplify right side
   142,488x = 20,002,781,007.82
5. Step 5: Solve for x
   x = 20,002,781,007.82/142,488
6. Step 6: Final answer
   x = 140,382.21