Finding the Fourth Proportional to 70.43, 105.69 and 53.33

Step by Step Solution

1. Step 1: Write the proportion equation
   70.43 : 105.69 = 53.33 : x
2. Step 2: Convert to fraction form
   70.43/105.69 = 53.33/x
3. Step 3: Cross multiply
   70.43x = 105.69 × 53.33
4. Step 4: Simplify right side
   70.43x = 5,635.65
5. Step 5: Solve for x
   x = 5,635.65/70.43
6. Step 6: Final answer
   x = 80.02