Finding the Fourth Proportional to 82.72, 123.93 and 52.25

Step by Step Solution

1. Step 1: Write the proportion equation
   82.72 : 123.93 = 52.25 : x
2. Step 2: Convert to fraction form
   82.72/123.93 = 52.25/x
3. Step 3: Cross multiply
   82.72x = 123.93 × 52.25
4. Step 4: Simplify right side
   82.72x = 6,474.72
5. Step 5: Solve for x
   x = 6,474.72/82.72
6. Step 6: Final answer
   x = 78.27