Finding the Third Proportional to 340,807 and 716,870

Step by Step Solution

1. Step 1: Write the proportion equation
   340,807 : 716,870 = 716,870 : x
2. Step 2: Convert to fraction form
   340,807/716,870 = 716,870/x
3. Step 3: Cross multiply
   340,807x = 716,870 × 716,870
4. Step 4: Simplify right side
   340,807x = 513,902,596,900
5. Step 5: Solve for x
   x = 513,902,596,900/340,807
6. Step 6: Final answer
   x = 1,507,899.18