Finding the Fourth Proportional to 82.89, 114.29 and 72.63

Step by Step Solution

1. Step 1: Write the proportion equation
   82.89 : 114.29 = 72.63 : x
2. Step 2: Convert to fraction form
   82.89/114.29 = 72.63/x
3. Step 3: Cross multiply
   82.89x = 114.29 × 72.63
4. Step 4: Simplify right side
   82.89x = 8,300.52
5. Step 5: Solve for x
   x = 8,300.52/82.89
6. Step 6: Final answer
   x = 100.14