Finding the Fourth Proportional to 142,074.35, 196,061.65 and 78,412.15

Step by Step Solution

1. Step 1: Write the proportion equation
   142,074.35 : 196,061.65 = 78,412.15 : x
2. Step 2: Convert to fraction form
   142,074.35/196,061.65 = 78,412.15/x
3. Step 3: Cross multiply
   142,074.35x = 196,061.65 × 78,412.15
4. Step 4: Simplify right side
   142,074.35x = 15,373,615,392.69
5. Step 5: Solve for x
   x = 15,373,615,392.69/142,074.35
6. Step 6: Final answer
   x = 108,208.24