Finding the Third Proportional to 311,452.50 and 445,374

Step by Step Solution

1. Step 1: Write the proportion equation
   311,452.50 : 445,374 = 445,374 : x
2. Step 2: Convert to fraction form
   311,452.50/445,374 = 445,374/x
3. Step 3: Cross multiply
   311,452.50x = 445,374 × 445,374
4. Step 4: Simplify right side
   311,452.50x = 198,357,999,876
5. Step 5: Solve for x
   x = 198,357,999,876/311,452.50
6. Step 6: Final answer
   x = 636,880.42