Finding the Fourth Proportional to 92.76, 139.01 and 72.38

Step by Step Solution

1. Step 1: Write the proportion equation
   92.76 : 139.01 = 72.38 : x
2. Step 2: Convert to fraction form
   92.76/139.01 = 72.38/x
3. Step 3: Cross multiply
   92.76x = 139.01 × 72.38
4. Step 4: Simplify right side
   92.76x = 10,061.03
5. Step 5: Solve for x
   x = 10,061.03/92.76
6. Step 6: Final answer
   x = 108.46