Finding the Fourth Proportional to 72.54, 108.69 and 61.14

Step by Step Solution

1. Step 1: Write the proportion equation
   72.54 : 108.69 = 61.14 : x
2. Step 2: Convert to fraction form
   72.54/108.69 = 61.14/x
3. Step 3: Cross multiply
   72.54x = 108.69 × 61.14
4. Step 4: Simplify right side
   72.54x = 6,645.31
5. Step 5: Solve for x
   x = 6,645.31/72.54
6. Step 6: Final answer
   x = 91.61