Finding the Fourth Proportional to 162.55, 223.72 and 142.50

Step by Step Solution

1. Step 1: Write the proportion equation
   162.55 : 223.72 = 142.50 : x
2. Step 2: Convert to fraction form
   162.55/223.72 = 142.50/x
3. Step 3: Cross multiply
   162.55x = 223.72 × 142.50
4. Step 4: Simplify right side
   162.55x = 31,880.10
5. Step 5: Solve for x
   x = 31,880.10/162.55
6. Step 6: Final answer
   x = 196.12