Finding the Fourth Proportional to 72.99, 100.91 and 59.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72.99 : 100.91 = 59.25 : x
2. Step 2: Convert to fraction form
   72.99/100.91 = 59.25/x
3. Step 3: Cross multiply
   72.99x = 100.91 × 59.25
4. Step 4: Simplify right side
   72.99x = 5,978.62
5. Step 5: Solve for x
   x = 5,978.62/72.99
6. Step 6: Final answer
   x = 81.91