Finding the Fourth Proportional to 82.50, 123.77 and 41.91

Step by Step Solution

1. Step 1: Write the proportion equation
   82.50 : 123.77 = 41.91 : x
2. Step 2: Convert to fraction form
   82.50/123.77 = 41.91/x
3. Step 3: Cross multiply
   82.50x = 123.77 × 41.91
4. Step 4: Simplify right side
   82.50x = 5,186.37
5. Step 5: Solve for x
   x = 5,186.37/82.50
6. Step 6: Final answer
   x = 62.87