Finding the Third Proportional to 340,808 and 716,870

Step by Step Solution

1. Step 1: Write the proportion equation
   340,808 : 716,870 = 716,870 : x
2. Step 2: Convert to fraction form
   340,808/716,870 = 716,870/x
3. Step 3: Cross multiply
   340,808x = 716,870 × 716,870
4. Step 4: Simplify right side
   340,808x = 513,902,596,900
5. Step 5: Solve for x
   x = 513,902,596,900/340,808
6. Step 6: Final answer
   x = 1,507,894.76