Finding the Fourth Proportional to 82.74, 123.82 and 61.03

Step by Step Solution

1. Step 1: Write the proportion equation
   82.74 : 123.82 = 61.03 : x
2. Step 2: Convert to fraction form
   82.74/123.82 = 61.03/x
3. Step 3: Cross multiply
   82.74x = 123.82 × 61.03
4. Step 4: Simplify right side
   82.74x = 7,556.38
5. Step 5: Solve for x
   x = 7,556.38/82.74
6. Step 6: Final answer
   x = 91.32