Finding the Third Proportional to 131,979 and 212,494.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,979 : 212,494.50 = 212,494.50 : x
2. Step 2: Convert to fraction form
   131,979/212,494.50 = 212,494.50/x
3. Step 3: Cross multiply
   131,979x = 212,494.50 × 212,494.50
4. Step 4: Simplify right side
   131,979x = 45,153,912,530.25
5. Step 5: Solve for x
   x = 45,153,912,530.25/131,979
6. Step 6: Final answer
   x = 342,129.52