Finding the Fourth Proportional to 142,162.56, 196,178.88 and 78,498.84

Step by Step Solution

1. Step 1: Write the proportion equation
   142,162.56 : 196,178.88 = 78,498.84 : x
2. Step 2: Convert to fraction form
   142,162.56/196,178.88 = 78,498.84/x
3. Step 3: Cross multiply
   142,162.56x = 196,178.88 × 78,498.84
4. Step 4: Simplify right side
   142,162.56x = 15,399,814,512.50
5. Step 5: Solve for x
   x = 15,399,814,512.50/142,162.56
6. Step 6: Final answer
   x = 108,325.39