Finding the Third Proportional to 443,149.50 and 645,348

Step by Step Solution

1. Step 1: Write the proportion equation
   443,149.50 : 645,348 = 645,348 : x
2. Step 2: Convert to fraction form
   443,149.50/645,348 = 645,348/x
3. Step 3: Cross multiply
   443,149.50x = 645,348 × 645,348
4. Step 4: Simplify right side
   443,149.50x = 416,474,041,104
5. Step 5: Solve for x
   x = 416,474,041,104/443,149.50
6. Step 6: Final answer
   x = 939,804.83