Finding the Fourth Proportional to 72.63, 108.94 and 40.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72.63 : 108.94 = 40.56 : x
2. Step 2: Convert to fraction form
   72.63/108.94 = 40.56/x
3. Step 3: Cross multiply
   72.63x = 108.94 × 40.56
4. Step 4: Simplify right side
   72.63x = 4,418.61
5. Step 5: Solve for x
   x = 4,418.61/72.63
6. Step 6: Final answer
   x = 60.84