Finding the Fourth Proportional to 72.10, 108.82 and 69.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72.10 : 108.82 = 69.56 : x
2. Step 2: Convert to fraction form
   72.10/108.82 = 69.56/x
3. Step 3: Cross multiply
   72.10x = 108.82 × 69.56
4. Step 4: Simplify right side
   72.10x = 7,569.52
5. Step 5: Solve for x
   x = 7,569.52/72.10
6. Step 6: Final answer
   x = 104.99