Finding the Fourth Proportional to 100.50, 150.06 and 85.02

Step by Step Solution

1. Step 1: Write the proportion equation
   100.50 : 150.06 = 85.02 : x
2. Step 2: Convert to fraction form
   100.50/150.06 = 85.02/x
3. Step 3: Cross multiply
   100.50x = 150.06 × 85.02
4. Step 4: Simplify right side
   100.50x = 12,758.10
5. Step 5: Solve for x
   x = 12,758.10/100.50
6. Step 6: Final answer
   x = 126.95