Finding the Fourth Proportional to 142,105.64, 196,105.91 and 78,443.37

Step by Step Solution

1. Step 1: Write the proportion equation
   142,105.64 : 196,105.91 = 78,443.37 : x
2. Step 2: Convert to fraction form
   142,105.64/196,105.91 = 78,443.37/x
3. Step 3: Cross multiply
   142,105.64x = 196,105.91 × 78,443.37
4. Step 4: Simplify right side
   142,105.64x = 15,383,208,065.10
5. Step 5: Solve for x
   x = 15,383,208,065.10/142,105.64
6. Step 6: Final answer
   x = 108,251.92