Finding the Fourth Proportional to 142,606.45, 196,735.12 and 85,986.37

Step by Step Solution

1. Step 1: Write the proportion equation
   142,606.45 : 196,735.12 = 85,986.37 : x
2. Step 2: Convert to fraction form
   142,606.45/196,735.12 = 85,986.37/x
3. Step 3: Cross multiply
   142,606.45x = 196,735.12 × 85,986.37
4. Step 4: Simplify right side
   142,606.45x = 16,916,538,820.31
5. Step 5: Solve for x
   x = 16,916,538,820.31/142,606.45
6. Step 6: Final answer
   x = 118,623.94