Finding the Fourth Proportional to 162.59, 243.59 and 89.39

Step by Step Solution

1. Step 1: Write the proportion equation
   162.59 : 243.59 = 89.39 : x
2. Step 2: Convert to fraction form
   162.59/243.59 = 89.39/x
3. Step 3: Cross multiply
   162.59x = 243.59 × 89.39
4. Step 4: Simplify right side
   162.59x = 21,773.18
5. Step 5: Solve for x
   x = 21,773.18/162.59
6. Step 6: Final answer
   x = 133.92