Finding the Fourth Proportional to 131.08, 196.61 and 53.99

Step by Step Solution

1. Step 1: Write the proportion equation
   131.08 : 196.61 = 53.99 : x
2. Step 2: Convert to fraction form
   131.08/196.61 = 53.99/x
3. Step 3: Cross multiply
   131.08x = 196.61 × 53.99
4. Step 4: Simplify right side
   131.08x = 10,615.20
5. Step 5: Solve for x
   x = 10,615.20/131.08
6. Step 6: Final answer
   x = 80.98