Finding the Fourth Proportional to 82.58, 123.88 and 61.34

Step by Step Solution

1. Step 1: Write the proportion equation
   82.58 : 123.88 = 61.34 : x
2. Step 2: Convert to fraction form
   82.58/123.88 = 61.34/x
3. Step 3: Cross multiply
   82.58x = 123.88 × 61.34
4. Step 4: Simplify right side
   82.58x = 7,598.80
5. Step 5: Solve for x
   x = 7,598.80/82.58
6. Step 6: Final answer
   x = 92.02