Finding the Fourth Proportional to 131.47, 196.99 and 109.87

Step by Step Solution

1. Step 1: Write the proportion equation
   131.47 : 196.99 = 109.87 : x
2. Step 2: Convert to fraction form
   131.47/196.99 = 109.87/x
3. Step 3: Cross multiply
   131.47x = 196.99 × 109.87
4. Step 4: Simplify right side
   131.47x = 21,643.29
5. Step 5: Solve for x
   x = 21,643.29/131.47
6. Step 6: Final answer
   x = 164.63