Finding the Third Proportional to 641,398.50 and 1,384,492.50

Step by Step Solution

1. Step 1: Write the proportion equation
   641,398.50 : 1,384,492.50 = 1,384,492.50 : x
2. Step 2: Convert to fraction form
   641,398.50/1,384,492.50 = 1,384,492.50/x
3. Step 3: Cross multiply
   641,398.50x = 1,384,492.50 × 1,384,492.50
4. Step 4: Simplify right side
   641,398.50x = 1,916,819,482,556.25
5. Step 5: Solve for x
   x = 1,916,819,482,556.25/641,398.50
6. Step 6: Final answer
   x = 2,988,500.10