Finding the Fourth Proportional to 72.18, 108.09 and 59.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72.18 : 108.09 = 59.25 : x
2. Step 2: Convert to fraction form
   72.18/108.09 = 59.25/x
3. Step 3: Cross multiply
   72.18x = 108.09 × 59.25
4. Step 4: Simplify right side
   72.18x = 6,404.33
5. Step 5: Solve for x
   x = 6,404.33/72.18
6. Step 6: Final answer
   x = 88.73