Finding the Third Proportional to 212,819.50 and 445,352

Step by Step Solution

1. Step 1: Write the proportion equation
   212,819.50 : 445,352 = 445,352 : x
2. Step 2: Convert to fraction form
   212,819.50/445,352 = 445,352/x
3. Step 3: Cross multiply
   212,819.50x = 445,352 × 445,352
4. Step 4: Simplify right side
   212,819.50x = 198,338,403,904
5. Step 5: Solve for x
   x = 198,338,403,904/212,819.50
6. Step 6: Final answer
   x = 931,955.97