Finding the Fourth Proportional to 131.39, 196.98 and 70.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131.39 : 196.98 = 70.50 : x
2. Step 2: Convert to fraction form
   131.39/196.98 = 70.50/x
3. Step 3: Cross multiply
   131.39x = 196.98 × 70.50
4. Step 4: Simplify right side
   131.39x = 13,887.09
5. Step 5: Solve for x
   x = 13,887.09/131.39
6. Step 6: Final answer
   x = 105.69