Finding the Fourth Proportional to 123.99, 171.01 and 82.52

Step by Step Solution

1. Step 1: Write the proportion equation
   123.99 : 171.01 = 82.52 : x
2. Step 2: Convert to fraction form
   123.99/171.01 = 82.52/x
3. Step 3: Cross multiply
   123.99x = 171.01 × 82.52
4. Step 4: Simplify right side
   123.99x = 14,111.75
5. Step 5: Solve for x
   x = 14,111.75/123.99
6. Step 6: Final answer
   x = 113.81