Finding the Fourth Proportional to 72.50, 100.06 and 69.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72.50 : 100.06 = 69.42 : x
2. Step 2: Convert to fraction form
   72.50/100.06 = 69.42/x
3. Step 3: Cross multiply
   72.50x = 100.06 × 69.42
4. Step 4: Simplify right side
   72.50x = 6,946.17
5. Step 5: Solve for x
   x = 6,946.17/72.50
6. Step 6: Final answer
   x = 95.81