Finding the Fourth Proportional to 82.30, 123.50 and 45.76

Step by Step Solution

1. Step 1: Write the proportion equation
   82.30 : 123.50 = 45.76 : x
2. Step 2: Convert to fraction form
   82.30/123.50 = 45.76/x
3. Step 3: Cross multiply
   82.30x = 123.50 × 45.76
4. Step 4: Simplify right side
   82.30x = 5,651.44
5. Step 5: Solve for x
   x = 5,651.44/82.30
6. Step 6: Final answer
   x = 68.67