Finding the Fourth Proportional to 82.32, 123.19 and 72.06

Step by Step Solution

1. Step 1: Write the proportion equation
   82.32 : 123.19 = 72.06 : x
2. Step 2: Convert to fraction form
   82.32/123.19 = 72.06/x
3. Step 3: Cross multiply
   82.32x = 123.19 × 72.06
4. Step 4: Simplify right side
   82.32x = 8,876.43
5. Step 5: Solve for x
   x = 8,876.43/82.32
6. Step 6: Final answer
   x = 107.83