Finding the Fourth Proportional to 142,372.56, 196,465.69 and 78,706.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,372.56 : 196,465.69 = 78,706.56 : x
2. Step 2: Convert to fraction form
   142,372.56/196,465.69 = 78,706.56/x
3. Step 3: Cross multiply
   142,372.56x = 196,465.69 × 78,706.56
4. Step 4: Simplify right side
   142,372.56x = 15,463,138,617.93
5. Step 5: Solve for x
   x = 15,463,138,617.93/142,372.56
6. Step 6: Final answer
   x = 108,610.39