Finding the Fourth Proportional to 109.49, 164.18 and 63.86

Step by Step Solution

1. Step 1: Write the proportion equation
   109.49 : 164.18 = 63.86 : x
2. Step 2: Convert to fraction form
   109.49/164.18 = 63.86/x
3. Step 3: Cross multiply
   109.49x = 164.18 × 63.86
4. Step 4: Simplify right side
   109.49x = 10,483.71
5. Step 5: Solve for x
   x = 10,483.71/109.49
6. Step 6: Final answer
   x = 95.75