Finding the Fourth Proportional to 142,663.69, 196,862.52 and 85,291.60

Step by Step Solution

1. Step 1: Write the proportion equation
   142,663.69 : 196,862.52 = 85,291.60 : x
2. Step 2: Convert to fraction form
   142,663.69/196,862.52 = 85,291.60/x
3. Step 3: Cross multiply
   142,663.69x = 196,862.52 × 85,291.60
4. Step 4: Simplify right side
   142,663.69x = 16,790,719,310.83
5. Step 5: Solve for x
   x = 16,790,719,310.83/142,663.69
6. Step 6: Final answer
   x = 117,694.41