Finding the Fourth Proportional to 142,462.20, 196,536.06 and 85,841.40

Step by Step Solution

1. Step 1: Write the proportion equation
   142,462.20 : 196,536.06 = 85,841.40 : x
2. Step 2: Convert to fraction form
   142,462.20/196,536.06 = 85,841.40/x
3. Step 3: Cross multiply
   142,462.20x = 196,536.06 × 85,841.40
4. Step 4: Simplify right side
   142,462.20x = 16,870,930,540.88
5. Step 5: Solve for x
   x = 16,870,930,540.88/142,462.20
6. Step 6: Final answer
   x = 118,423.91