Finding the Fourth Proportional to 72.38, 99.83 and 50.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72.38 : 99.83 = 50.50 : x
2. Step 2: Convert to fraction form
   72.38/99.83 = 50.50/x
3. Step 3: Cross multiply
   72.38x = 99.83 × 50.50
4. Step 4: Simplify right side
   72.38x = 5,041.42
5. Step 5: Solve for x
   x = 5,041.42/72.38
6. Step 6: Final answer
   x = 69.65