Finding the Fourth Proportional to 142,369.77, 196,474.41 and 78,711.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,369.77 : 196,474.41 = 78,711.69 : x
2. Step 2: Convert to fraction form
   142,369.77/196,474.41 = 78,711.69/x
3. Step 3: Cross multiply
   142,369.77x = 196,474.41 × 78,711.69
4. Step 4: Simplify right side
   142,369.77x = 15,464,832,852.85
5. Step 5: Solve for x
   x = 15,464,832,852.85/142,369.77
6. Step 6: Final answer
   x = 108,624.41