Finding the Fourth Proportional to 82.53, 123.73 and 71.25

Step by Step Solution

1. Step 1: Write the proportion equation
   82.53 : 123.73 = 71.25 : x
2. Step 2: Convert to fraction form
   82.53/123.73 = 71.25/x
3. Step 3: Cross multiply
   82.53x = 123.73 × 71.25
4. Step 4: Simplify right side
   82.53x = 8,815.76
5. Step 5: Solve for x
   x = 8,815.76/82.53
6. Step 6: Final answer
   x = 106.82