Finding the Fourth Proportional to 142,323.96, 196,407.10 and 78,661.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,323.96 : 196,407.10 = 78,661.76 : x
2. Step 2: Convert to fraction form
   142,323.96/196,407.10 = 78,661.76/x
3. Step 3: Cross multiply
   142,323.96x = 196,407.10 × 78,661.76
4. Step 4: Simplify right side
   142,323.96x = 15,449,728,052.42
5. Step 5: Solve for x
   x = 15,449,728,052.42/142,323.96
6. Step 6: Final answer
   x = 108,553.25