Finding the Fourth Proportional to 142,568.96, 196,731.71 and 85,196.86

Step by Step Solution

1. Step 1: Write the proportion equation
   142,568.96 : 196,731.71 = 85,196.86 : x
2. Step 2: Convert to fraction form
   142,568.96/196,731.71 = 85,196.86/x
3. Step 3: Cross multiply
   142,568.96x = 196,731.71 × 85,196.86
4. Step 4: Simplify right side
   142,568.96x = 16,760,924,837.12
5. Step 5: Solve for x
   x = 16,760,924,837.12/142,568.96
6. Step 6: Final answer
   x = 117,563.63