Finding the Fourth Proportional to 72.50, 108.73 and 59.05

Step by Step Solution

1. Step 1: Write the proportion equation
   72.50 : 108.73 = 59.05 : x
2. Step 2: Convert to fraction form
   72.50/108.73 = 59.05/x
3. Step 3: Cross multiply
   72.50x = 108.73 × 59.05
4. Step 4: Simplify right side
   72.50x = 6,420.51
5. Step 5: Solve for x
   x = 6,420.51/72.50
6. Step 6: Final answer
   x = 88.56