Finding the Fourth Proportional to 72.64, 100.32 and 69.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72.64 : 100.32 = 69.96 : x
2. Step 2: Convert to fraction form
   72.64/100.32 = 69.96/x
3. Step 3: Cross multiply
   72.64x = 100.32 × 69.96
4. Step 4: Simplify right side
   72.64x = 7,018.39
5. Step 5: Solve for x
   x = 7,018.39/72.64
6. Step 6: Final answer
   x = 96.62