Finding the Fourth Proportional to 72.74, 108.56 and 69.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72.74 : 108.56 = 69.10 : x
2. Step 2: Convert to fraction form
   72.74/108.56 = 69.10/x
3. Step 3: Cross multiply
   72.74x = 108.56 × 69.10
4. Step 4: Simplify right side
   72.74x = 7,501.50
5. Step 5: Solve for x
   x = 7,501.50/72.74
6. Step 6: Final answer
   x = 103.13