Finding the Fourth Proportional to 100.56, 150.82 and 64.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100.56 : 150.82 = 64.50 : x
2. Step 2: Convert to fraction form
   100.56/150.82 = 64.50/x
3. Step 3: Cross multiply
   100.56x = 150.82 × 64.50
4. Step 4: Simplify right side
   100.56x = 9,727.89
5. Step 5: Solve for x
   x = 9,727.89/100.56
6. Step 6: Final answer
   x = 96.74