Finding the Fourth Proportional to 72.42, 99.81 and 69.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72.42 : 99.81 = 69.18 : x
2. Step 2: Convert to fraction form
   72.42/99.81 = 69.18/x
3. Step 3: Cross multiply
   72.42x = 99.81 × 69.18
4. Step 4: Simplify right side
   72.42x = 6,904.86
5. Step 5: Solve for x
   x = 6,904.86/72.42
6. Step 6: Final answer
   x = 95.34