Finding the Fourth Proportional to 72.52, 108.83 and 54.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72.52 : 108.83 = 54.61 : x
2. Step 2: Convert to fraction form
   72.52/108.83 = 54.61/x
3. Step 3: Cross multiply
   72.52x = 108.83 × 54.61
4. Step 4: Simplify right side
   72.52x = 5,943.21
5. Step 5: Solve for x
   x = 5,943.21/72.52
6. Step 6: Final answer
   x = 81.95