Finding the Fourth Proportional to 100.94, 139.31 and 57.27

Step by Step Solution

1. Step 1: Write the proportion equation
   100.94 : 139.31 = 57.27 : x
2. Step 2: Convert to fraction form
   100.94/139.31 = 57.27/x
3. Step 3: Cross multiply
   100.94x = 139.31 × 57.27
4. Step 4: Simplify right side
   100.94x = 7,978.49
5. Step 5: Solve for x
   x = 7,978.49/100.94
6. Step 6: Final answer
   x = 79.04