Finding the Fourth Proportional to 162.56, 243.15 and 140.00

Step by Step Solution

1. Step 1: Write the proportion equation
   162.56 : 243.15 = 140.00 : x
2. Step 2: Convert to fraction form
   162.56/243.15 = 140.00/x
3. Step 3: Cross multiply
   162.56x = 243.15 × 140.00
4. Step 4: Simplify right side
   162.56x = 34,042.10
5. Step 5: Solve for x
   x = 34,042.10/162.56
6. Step 6: Final answer
   x = 209.42