Finding the Fourth Proportional to 82.00, 112.89 and 65.60

Step by Step Solution

1. Step 1: Write the proportion equation
   82.00 : 112.89 = 65.60 : x
2. Step 2: Convert to fraction form
   82.00/112.89 = 65.60/x
3. Step 3: Cross multiply
   82.00x = 112.89 × 65.60
4. Step 4: Simplify right side
   82.00x = 7,405.02
5. Step 5: Solve for x
   x = 7,405.02/82.00
6. Step 6: Final answer
   x = 90.31