Finding the Fourth Proportional to 82.90, 114.18 and 67.30

Step by Step Solution

1. Step 1: Write the proportion equation
   82.90 : 114.18 = 67.30 : x
2. Step 2: Convert to fraction form
   82.90/114.18 = 67.30/x
3. Step 3: Cross multiply
   82.90x = 114.18 × 67.30
4. Step 4: Simplify right side
   82.90x = 7,684.31
5. Step 5: Solve for x
   x = 7,684.31/82.90
6. Step 6: Final answer
   x = 92.69