Finding the Third Proportional to 59,990 and 131,279.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,990 : 131,279.50 = 131,279.50 : x
2. Step 2: Convert to fraction form
   59,990/131,279.50 = 131,279.50/x
3. Step 3: Cross multiply
   59,990x = 131,279.50 × 131,279.50
4. Step 4: Simplify right side
   59,990x = 17,234,307,120.25
5. Step 5: Solve for x
   x = 17,234,307,120.25/59,990
6. Step 6: Final answer
   x = 287,286.33