Finding the Fourth Proportional to 82.05, 123.15 and 62.88

Step by Step Solution

1. Step 1: Write the proportion equation
   82.05 : 123.15 = 62.88 : x
2. Step 2: Convert to fraction form
   82.05/123.15 = 62.88/x
3. Step 3: Cross multiply
   82.05x = 123.15 × 62.88
4. Step 4: Simplify right side
   82.05x = 7,743.67
5. Step 5: Solve for x
   x = 7,743.67/82.05
6. Step 6: Final answer
   x = 94.38