Finding the Fourth Proportional to 142,637.94, 196,846.50 and 78,975.73

Step by Step Solution

1. Step 1: Write the proportion equation
   142,637.94 : 196,846.50 = 78,975.73 : x
2. Step 2: Convert to fraction form
   142,637.94/196,846.50 = 78,975.73/x
3. Step 3: Cross multiply
   142,637.94x = 196,846.50 × 78,975.73
4. Step 4: Simplify right side
   142,637.94x = 15,546,096,035.45
5. Step 5: Solve for x
   x = 15,546,096,035.45/142,637.94
6. Step 6: Final answer
   x = 108,989.91