Finding the Fourth Proportional to 142,662.69, 196,861.14 and 85,290.60

Step by Step Solution

1. Step 1: Write the proportion equation
   142,662.69 : 196,861.14 = 85,290.60 : x
2. Step 2: Convert to fraction form
   142,662.69/196,861.14 = 85,290.60/x
3. Step 3: Cross multiply
   142,662.69x = 196,861.14 × 85,290.60
4. Step 4: Simplify right side
   142,662.69x = 16,790,404,747.28
5. Step 5: Solve for x
   x = 16,790,404,747.28/142,662.69
6. Step 6: Final answer
   x = 117,693.03