Finding the Fourth Proportional to 69.35, 103.96 and 53.05

Step by Step Solution

1. Step 1: Write the proportion equation
   69.35 : 103.96 = 53.05 : x
2. Step 2: Convert to fraction form
   69.35/103.96 = 53.05/x
3. Step 3: Cross multiply
   69.35x = 103.96 × 53.05
4. Step 4: Simplify right side
   69.35x = 5,514.81
5. Step 5: Solve for x
   x = 5,514.81/69.35
6. Step 6: Final answer
   x = 79.52