Finding the Fourth Proportional to 82.73, 123.65 and 64.50

Step by Step Solution

1. Step 1: Write the proportion equation
   82.73 : 123.65 = 64.50 : x
2. Step 2: Convert to fraction form
   82.73/123.65 = 64.50/x
3. Step 3: Cross multiply
   82.73x = 123.65 × 64.50
4. Step 4: Simplify right side
   82.73x = 7,975.10
5. Step 5: Solve for x
   x = 7,975.10/82.73
6. Step 6: Final answer
   x = 96.40