Finding the Third Proportional to 131,988 and 198,619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,988 : 198,619.50 = 198,619.50 : x
2. Step 2: Convert to fraction form
   131,988/198,619.50 = 198,619.50/x
3. Step 3: Cross multiply
   131,988x = 198,619.50 × 198,619.50
4. Step 4: Simplify right side
   131,988x = 39,449,705,780.25
5. Step 5: Solve for x
   x = 39,449,705,780.25/131,988
6. Step 6: Final answer
   x = 298,888.58