Finding the Third Proportional to 643,328 and 1,375,000

Step by Step Solution

1. Step 1: Write the proportion equation
   643,328 : 1,375,000 = 1,375,000 : x
2. Step 2: Convert to fraction form
   643,328/1,375,000 = 1,375,000/x
3. Step 3: Cross multiply
   643,328x = 1,375,000 × 1,375,000
4. Step 4: Simplify right side
   643,328x = 1,890,625,000,000
5. Step 5: Solve for x
   x = 1,890,625,000,000/643,328
6. Step 6: Final answer
   x = 2,938,819.70