Finding the Third Proportional to 343,451 and 746,042.50

Step by Step Solution

1. Step 1: Write the proportion equation
   343,451 : 746,042.50 = 746,042.50 : x
2. Step 2: Convert to fraction form
   343,451/746,042.50 = 746,042.50/x
3. Step 3: Cross multiply
   343,451x = 746,042.50 × 746,042.50
4. Step 4: Simplify right side
   343,451x = 556,579,411,806.25
5. Step 5: Solve for x
   x = 556,579,411,806.25/343,451
6. Step 6: Final answer
   x = 1,620,549.69