Finding the Fourth Proportional to 142,656.99, 196,864.24 and 78,993.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142,656.99 : 196,864.24 = 78,993.42 : x
2. Step 2: Convert to fraction form
   142,656.99/196,864.24 = 78,993.42/x
3. Step 3: Cross multiply
   142,656.99x = 196,864.24 × 78,993.42
4. Step 4: Simplify right side
   142,656.99x = 15,550,979,593.30
5. Step 5: Solve for x
   x = 15,550,979,593.30/142,656.99
6. Step 6: Final answer
   x = 109,009.59