Finding the Fourth Proportional to 72.53, 108.83 and 72.30

Step by Step Solution

1. Step 1: Write the proportion equation
   72.53 : 108.83 = 72.30 : x
2. Step 2: Convert to fraction form
   72.53/108.83 = 72.30/x
3. Step 3: Cross multiply
   72.53x = 108.83 × 72.30
4. Step 4: Simplify right side
   72.53x = 7,867.64
5. Step 5: Solve for x
   x = 7,867.64/72.53
6. Step 6: Final answer
   x = 108.48