Finding the Fourth Proportional to 142,150.94, 196,163.15 and 78,487.37

Step by Step Solution

1. Step 1: Write the proportion equation
   142,150.94 : 196,163.15 = 78,487.37 : x
2. Step 2: Convert to fraction form
   142,150.94/196,163.15 = 78,487.37/x
3. Step 3: Cross multiply
   142,150.94x = 196,163.15 × 78,487.37
4. Step 4: Simplify right side
   142,150.94x = 15,396,329,096.77
5. Step 5: Solve for x
   x = 15,396,329,096.77/142,150.94
6. Step 6: Final answer
   x = 108,309.73