Finding the Fourth Proportional to 142,540.10, 196,691.98 and 85,168

Step by Step Solution

1. Step 1: Write the proportion equation
   142,540.10 : 196,691.98 = 85,168 : x
2. Step 2: Convert to fraction form
   142,540.10/196,691.98 = 85,168/x
3. Step 3: Cross multiply
   142,540.10x = 196,691.98 × 85,168
4. Step 4: Simplify right side
   142,540.10x = 16,751,862,552.64
5. Step 5: Solve for x
   x = 16,751,862,552.64/142,540.10
6. Step 6: Final answer
   x = 117,523.86