Finding the Fourth Proportional to 72.72, 100.20 and 69.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72.72 : 100.20 = 69.88 : x
2. Step 2: Convert to fraction form
   72.72/100.20 = 69.88/x
3. Step 3: Cross multiply
   72.72x = 100.20 × 69.88
4. Step 4: Simplify right side
   72.72x = 7,001.98
5. Step 5: Solve for x
   x = 7,001.98/72.72
6. Step 6: Final answer
   x = 96.29