Finding the Fourth Proportional to 72.52, 100.09 and 50.39

Step by Step Solution

1. Step 1: Write the proportion equation
   72.52 : 100.09 = 50.39 : x
2. Step 2: Convert to fraction form
   72.52/100.09 = 50.39/x
3. Step 3: Cross multiply
   72.52x = 100.09 × 50.39
4. Step 4: Simplify right side
   72.52x = 5,043.54
5. Step 5: Solve for x
   x = 5,043.54/72.52
6. Step 6: Final answer
   x = 69.55