Finding the Fourth Proportional to 72.63, 108.81 and 45.59

Step by Step Solution

1. Step 1: Write the proportion equation
   72.63 : 108.81 = 45.59 : x
2. Step 2: Convert to fraction form
   72.63/108.81 = 45.59/x
3. Step 3: Cross multiply
   72.63x = 108.81 × 45.59
4. Step 4: Simplify right side
   72.63x = 4,960.10
5. Step 5: Solve for x
   x = 4,960.10/72.63
6. Step 6: Final answer
   x = 68.29