Finding the Fourth Proportional to 109.43, 164.15 and 72.94

Step by Step Solution

1. Step 1: Write the proportion equation
   109.43 : 164.15 = 72.94 : x
2. Step 2: Convert to fraction form
   109.43/164.15 = 72.94/x
3. Step 3: Cross multiply
   109.43x = 164.15 × 72.94
4. Step 4: Simplify right side
   109.43x = 11,973.10
5. Step 5: Solve for x
   x = 11,973.10/109.43
6. Step 6: Final answer
   x = 109.41