Finding the Fourth Proportional to 117.52, 162.24 and 78.25

Step by Step Solution

1. Step 1: Write the proportion equation
   117.52 : 162.24 = 78.25 : x
2. Step 2: Convert to fraction form
   117.52/162.24 = 78.25/x
3. Step 3: Cross multiply
   117.52x = 162.24 × 78.25
4. Step 4: Simplify right side
   117.52x = 12,694.87
5. Step 5: Solve for x
   x = 12,694.87/117.52
6. Step 6: Final answer
   x = 108.02