Finding the Fourth Proportional to 72.37, 108.42 and 45.37

Step by Step Solution

1. Step 1: Write the proportion equation
   72.37 : 108.42 = 45.37 : x
2. Step 2: Convert to fraction form
   72.37/108.42 = 45.37/x
3. Step 3: Cross multiply
   72.37x = 108.42 × 45.37
4. Step 4: Simplify right side
   72.37x = 4,919.02
5. Step 5: Solve for x
   x = 4,919.02/72.37
6. Step 6: Final answer
   x = 67.97