Finding the Third Proportional to 212,818.50 and 445,350

Step by Step Solution

1. Step 1: Write the proportion equation
   212,818.50 : 445,350 = 445,350 : x
2. Step 2: Convert to fraction form
   212,818.50/445,350 = 445,350/x
3. Step 3: Cross multiply
   212,818.50x = 445,350 × 445,350
4. Step 4: Simplify right side
   212,818.50x = 198,336,622,500
5. Step 5: Solve for x
   x = 198,336,622,500/212,818.50
6. Step 6: Final answer
   x = 931,951.98