Finding the Fourth Proportional to 100.54, 150.73 and 42.73

Step by Step Solution

1. Step 1: Write the proportion equation
   100.54 : 150.73 = 42.73 : x
2. Step 2: Convert to fraction form
   100.54/150.73 = 42.73/x
3. Step 3: Cross multiply
   100.54x = 150.73 × 42.73
4. Step 4: Simplify right side
   100.54x = 6,439.73
5. Step 5: Solve for x
   x = 6,439.73/100.54
6. Step 6: Final answer
   x = 64.05