Finding the Fourth Proportional to 72.95, 109.49 and 50.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72.95 : 109.49 = 50.09 : x
2. Step 2: Convert to fraction form
   72.95/109.49 = 50.09/x
3. Step 3: Cross multiply
   72.95x = 109.49 × 50.09
4. Step 4: Simplify right side
   72.95x = 5,484.35
5. Step 5: Solve for x
   x = 5,484.35/72.95
6. Step 6: Final answer
   x = 75.18