Finding the Fourth Proportional to 70.46, 105.50 and 53.29

Step by Step Solution

1. Step 1: Write the proportion equation
   70.46 : 105.50 = 53.29 : x
2. Step 2: Convert to fraction form
   70.46/105.50 = 53.29/x
3. Step 3: Cross multiply
   70.46x = 105.50 × 53.29
4. Step 4: Simplify right side
   70.46x = 5,621.56
5. Step 5: Solve for x
   x = 5,621.56/70.46
6. Step 6: Final answer
   x = 79.79