Finding the Fourth Proportional to 82.32, 113.82 and 72.60

Step by Step Solution

1. Step 1: Write the proportion equation
   82.32 : 113.82 = 72.60 : x
2. Step 2: Convert to fraction form
   82.32/113.82 = 72.60/x
3. Step 3: Cross multiply
   82.32x = 113.82 × 72.60
4. Step 4: Simplify right side
   82.32x = 8,263.33
5. Step 5: Solve for x
   x = 8,263.33/82.32
6. Step 6: Final answer
   x = 100.38