Finding the Fourth Proportional to 82.67, 123.99 and 31.31

Step by Step Solution

1. Step 1: Write the proportion equation
   82.67 : 123.99 = 31.31 : x
2. Step 2: Convert to fraction form
   82.67/123.99 = 31.31/x
3. Step 3: Cross multiply
   82.67x = 123.99 × 31.31
4. Step 4: Simplify right side
   82.67x = 3,882.13
5. Step 5: Solve for x
   x = 3,882.13/82.67
6. Step 6: Final answer
   x = 46.96