Finding the Fourth Proportional to 72.42, 108.42 and 49.55

Step by Step Solution

1. Step 1: Write the proportion equation
   72.42 : 108.42 = 49.55 : x
2. Step 2: Convert to fraction form
   72.42/108.42 = 49.55/x
3. Step 3: Cross multiply
   72.42x = 108.42 × 49.55
4. Step 4: Simplify right side
   72.42x = 5,371.67
5. Step 5: Solve for x
   x = 5,371.67/72.42
6. Step 6: Final answer
   x = 74.17