Finding the Fourth Proportional to 109.91, 164.55 and 61.73

Step by Step Solution

1. Step 1: Write the proportion equation
   109.91 : 164.55 = 61.73 : x
2. Step 2: Convert to fraction form
   109.91/164.55 = 61.73/x
3. Step 3: Cross multiply
   109.91x = 164.55 × 61.73
4. Step 4: Simplify right side
   109.91x = 10,157.67
5. Step 5: Solve for x
   x = 10,157.67/109.91
6. Step 6: Final answer
   x = 92.42