Finding the Fourth Proportional to 82.31, 113.55 and 49.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82.31 : 113.55 = 49.10 : x
2. Step 2: Convert to fraction form
   82.31/113.55 = 49.10/x
3. Step 3: Cross multiply
   82.31x = 113.55 × 49.10
4. Step 4: Simplify right side
   82.31x = 5,574.55
5. Step 5: Solve for x
   x = 5,574.55/82.31
6. Step 6: Final answer
   x = 67.73