Finding the Fourth Proportional to 142.31, 196.37 and 84.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142.31 : 196.37 = 84.10 : x
2. Step 2: Convert to fraction form
   142.31/196.37 = 84.10/x
3. Step 3: Cross multiply
   142.31x = 196.37 × 84.10
4. Step 4: Simplify right side
   142.31x = 16,513.31
5. Step 5: Solve for x
   x = 16,513.31/142.31
6. Step 6: Final answer
   x = 116.04