Finding the Third Proportional to 343,458 and 746,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   343,458 : 746,059.50 = 746,059.50 : x
2. Step 2: Convert to fraction form
   343,458/746,059.50 = 746,059.50/x
3. Step 3: Cross multiply
   343,458x = 746,059.50 × 746,059.50
4. Step 4: Simplify right side
   343,458x = 556,604,777,540.25
5. Step 5: Solve for x
   x = 556,604,777,540.25/343,458
6. Step 6: Final answer
   x = 1,620,590.52