Finding the Fourth Proportional to 72.99, 100.73 and 40.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72.99 : 100.73 = 40.25 : x
2. Step 2: Convert to fraction form
   72.99/100.73 = 40.25/x
3. Step 3: Cross multiply
   72.99x = 100.73 × 40.25
4. Step 4: Simplify right side
   72.99x = 4,054.18
5. Step 5: Solve for x
   x = 4,054.18/72.99
6. Step 6: Final answer
   x = 55.54