Finding the Fourth Proportional to 142,450.72, 196,581 and 78,786.16

Step by Step Solution

1. Step 1: Write the proportion equation
   142,450.72 : 196,581 = 78,786.16 : x
2. Step 2: Convert to fraction form
   142,450.72/196,581 = 78,786.16/x
3. Step 3: Cross multiply
   142,450.72x = 196,581 × 78,786.16
4. Step 4: Simplify right side
   142,450.72x = 15,487,862,118.96
5. Step 5: Solve for x
   x = 15,487,862,118.96/142,450.72
6. Step 6: Final answer
   x = 108,724.35