Finding the Fourth Proportional to 82.37, 123.30 and 72.14

Step by Step Solution

1. Step 1: Write the proportion equation
   82.37 : 123.30 = 72.14 : x
2. Step 2: Convert to fraction form
   82.37/123.30 = 72.14/x
3. Step 3: Cross multiply
   82.37x = 123.30 × 72.14
4. Step 4: Simplify right side
   82.37x = 8,894.25
5. Step 5: Solve for x
   x = 8,894.25/82.37
6. Step 6: Final answer
   x = 107.98