Finding the Fourth Proportional to 131.18, 196.61 and 73.39

Step by Step Solution

1. Step 1: Write the proportion equation
   131.18 : 196.61 = 73.39 : x
2. Step 2: Convert to fraction form
   131.18/196.61 = 73.39/x
3. Step 3: Cross multiply
   131.18x = 196.61 × 73.39
4. Step 4: Simplify right side
   131.18x = 14,428.22
5. Step 5: Solve for x
   x = 14,428.22/131.18
6. Step 6: Final answer
   x = 109.99