Finding the Fourth Proportional to 142,500, 196,632.96 and 78,829.14

Step by Step Solution

1. Step 1: Write the proportion equation
   142,500 : 196,632.96 = 78,829.14 : x
2. Step 2: Convert to fraction form
   142,500/196,632.96 = 78,829.14/x
3. Step 3: Cross multiply
   142,500x = 196,632.96 × 78,829.14
4. Step 4: Simplify right side
   142,500x = 15,500,407,132.45
5. Step 5: Solve for x
   x = 15,500,407,132.45/142,500
6. Step 6: Final answer
   x = 108,774.79