Finding the Fourth Proportional to 117.82, 162.52 and 74.15

Step by Step Solution

1. Step 1: Write the proportion equation
   117.82 : 162.52 = 74.15 : x
2. Step 2: Convert to fraction form
   117.82/162.52 = 74.15/x
3. Step 3: Cross multiply
   117.82x = 162.52 × 74.15
4. Step 4: Simplify right side
   117.82x = 12,050.86
5. Step 5: Solve for x
   x = 12,050.86/117.82
6. Step 6: Final answer
   x = 102.28