Finding the Fourth Proportional to 70.56, 105.72 and 50.17

Step by Step Solution

1. Step 1: Write the proportion equation
   70.56 : 105.72 = 50.17 : x
2. Step 2: Convert to fraction form
   70.56/105.72 = 50.17/x
3. Step 3: Cross multiply
   70.56x = 105.72 × 50.17
4. Step 4: Simplify right side
   70.56x = 5,303.71
5. Step 5: Solve for x
   x = 5,303.71/70.56
6. Step 6: Final answer
   x = 75.17