Finding the Fourth Proportional to 72.72, 109.15 and 61.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72.72 : 109.15 = 61.32 : x
2. Step 2: Convert to fraction form
   72.72/109.15 = 61.32/x
3. Step 3: Cross multiply
   72.72x = 109.15 × 61.32
4. Step 4: Simplify right side
   72.72x = 6,693.33
5. Step 5: Solve for x
   x = 6,693.33/72.72
6. Step 6: Final answer
   x = 92.04