Finding the Fourth Proportional to 162.72, 243.14 and 123.98

Step by Step Solution

1. Step 1: Write the proportion equation
   162.72 : 243.14 = 123.98 : x
2. Step 2: Convert to fraction form
   162.72/243.14 = 123.98/x
3. Step 3: Cross multiply
   162.72x = 243.14 × 123.98
4. Step 4: Simplify right side
   162.72x = 30,144.50
5. Step 5: Solve for x
   x = 30,144.50/162.72
6. Step 6: Final answer
   x = 185.25