Finding the Fourth Proportional to 69.55, 103.89 and 53.29

Step by Step Solution

1. Step 1: Write the proportion equation
   69.55 : 103.89 = 53.29 : x
2. Step 2: Convert to fraction form
   69.55/103.89 = 53.29/x
3. Step 3: Cross multiply
   69.55x = 103.89 × 53.29
4. Step 4: Simplify right side
   69.55x = 5,536.63
5. Step 5: Solve for x
   x = 5,536.63/69.55
6. Step 6: Final answer
   x = 79.61