Finding the Fourth Proportional to 59.69, 82.80 and 57.53

Step by Step Solution

1. Step 1: Write the proportion equation
   59.69 : 82.80 = 57.53 : x
2. Step 2: Convert to fraction form
   59.69/82.80 = 57.53/x
3. Step 3: Cross multiply
   59.69x = 82.80 × 57.53
4. Step 4: Simplify right side
   59.69x = 4,763.29
5. Step 5: Solve for x
   x = 4,763.29/59.69
6. Step 6: Final answer
   x = 79.81