Finding the Fourth Proportional to 72.64, 100.29 and 50.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72.64 : 100.29 = 50.50 : x
2. Step 2: Convert to fraction form
   72.64/100.29 = 50.50/x
3. Step 3: Cross multiply
   72.64x = 100.29 × 50.50
4. Step 4: Simplify right side
   72.64x = 5,064.68
5. Step 5: Solve for x
   x = 5,064.68/72.64
6. Step 6: Final answer
   x = 69.72