Finding the Fourth Proportional to 79.53, 109.71 and 53.31

Step by Step Solution

1. Step 1: Write the proportion equation
   79.53 : 109.71 = 53.31 : x
2. Step 2: Convert to fraction form
   79.53/109.71 = 53.31/x
3. Step 3: Cross multiply
   79.53x = 109.71 × 53.31
4. Step 4: Simplify right side
   79.53x = 5,847.83
5. Step 5: Solve for x
   x = 5,847.83/79.53
6. Step 6: Final answer
   x = 73.53