Finding the Fourth Proportional to 100.53, 150.89 and 82.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100.53 : 150.89 = 82.50 : x
2. Step 2: Convert to fraction form
   100.53/150.89 = 82.50/x
3. Step 3: Cross multiply
   100.53x = 150.89 × 82.50
4. Step 4: Simplify right side
   100.53x = 12,448.01
5. Step 5: Solve for x
   x = 12,448.01/100.53
6. Step 6: Final answer
   x = 123.82