Finding the Fourth Proportional to 111.90, 154.62 and 82.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111.90 : 154.62 = 82.50 : x
2. Step 2: Convert to fraction form
   111.90/154.62 = 82.50/x
3. Step 3: Cross multiply
   111.90x = 154.62 × 82.50
4. Step 4: Simplify right side
   111.90x = 12,756.15
5. Step 5: Solve for x
   x = 12,756.15/111.90
6. Step 6: Final answer
   x = 114.00