Finding the Fourth Proportional to 82.30, 113.56 and 49.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82.30 : 113.56 = 49.10 : x
2. Step 2: Convert to fraction form
   82.30/113.56 = 49.10/x
3. Step 3: Cross multiply
   82.30x = 113.56 × 49.10
4. Step 4: Simplify right side
   82.30x = 5,575.91
5. Step 5: Solve for x
   x = 5,575.91/82.30
6. Step 6: Final answer
   x = 67.75