Finding the Third Proportional to 340,390.69 and 740,662.31

Step by Step Solution

1. Step 1: Write the proportion equation
   340,390.69 : 740,662.31 = 740,662.31 : x
2. Step 2: Convert to fraction form
   340,390.69/740,662.31 = 740,662.31/x
3. Step 3: Cross multiply
   340,390.69x = 740,662.31 × 740,662.31
4. Step 4: Simplify right side
   340,390.69x = 548,580,661,157.85
5. Step 5: Solve for x
   x = 548,580,661,157.85/340,390.69
6. Step 6: Final answer
   x = 1,611,620.65