Finding the Fourth Proportional to 72.39, 99.87 and 50.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72.39 : 99.87 = 50.52 : x
2. Step 2: Convert to fraction form
   72.39/99.87 = 50.52/x
3. Step 3: Cross multiply
   72.39x = 99.87 × 50.52
4. Step 4: Simplify right side
   72.39x = 5,045.62
5. Step 5: Solve for x
   x = 5,045.62/72.39
6. Step 6: Final answer
   x = 69.70