Finding the Fourth Proportional to 82.98, 114.48 and 61.18

Step by Step Solution

1. Step 1: Write the proportion equation
   82.98 : 114.48 = 61.18 : x
2. Step 2: Convert to fraction form
   82.98/114.48 = 61.18/x
3. Step 3: Cross multiply
   82.98x = 114.48 × 61.18
4. Step 4: Simplify right side
   82.98x = 7,003.89
5. Step 5: Solve for x
   x = 7,003.89/82.98
6. Step 6: Final answer
   x = 84.40