Finding the Fourth Proportional to 83.31, 124.07 and 82.77

Step by Step Solution

1. Step 1: Write the proportion equation
   83.31 : 124.07 = 82.77 : x
2. Step 2: Convert to fraction form
   83.31/124.07 = 82.77/x
3. Step 3: Cross multiply
   83.31x = 124.07 × 82.77
4. Step 4: Simplify right side
   83.31x = 10,268.86
5. Step 5: Solve for x
   x = 10,268.86/83.31
6. Step 6: Final answer
   x = 123.26