Finding the Third Proportional to 340,659 and 716,590.50

Step by Step Solution

1. Step 1: Write the proportion equation
   340,659 : 716,590.50 = 716,590.50 : x
2. Step 2: Convert to fraction form
   340,659/716,590.50 = 716,590.50/x
3. Step 3: Cross multiply
   340,659x = 716,590.50 × 716,590.50
4. Step 4: Simplify right side
   340,659x = 513,501,944,690.25
5. Step 5: Solve for x
   x = 513,501,944,690.25/340,659
6. Step 6: Final answer
   x = 1,507,378.18