Finding the Fourth Proportional to 142,659, 196,867 and 78,995.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142,659 : 196,867 = 78,995.42 : x
2. Step 2: Convert to fraction form
   142,659/196,867 = 78,995.42/x
3. Step 3: Cross multiply
   142,659x = 196,867 × 78,995.42
4. Step 4: Simplify right side
   142,659x = 15,551,591,349.14
5. Step 5: Solve for x
   x = 15,551,591,349.14/142,659
6. Step 6: Final answer
   x = 109,012.34