Finding the Fourth Proportional to 82.65, 123.94 and 28.52

Step by Step Solution

1. Step 1: Write the proportion equation
   82.65 : 123.94 = 28.52 : x
2. Step 2: Convert to fraction form
   82.65/123.94 = 28.52/x
3. Step 3: Cross multiply
   82.65x = 123.94 × 28.52
4. Step 4: Simplify right side
   82.65x = 3,534.77
5. Step 5: Solve for x
   x = 3,534.77/82.65
6. Step 6: Final answer
   x = 42.77