Finding the Third Proportional to 680,388 and 1,426,386

Step by Step Solution

1. Step 1: Write the proportion equation
   680,388 : 1,426,386 = 1,426,386 : x
2. Step 2: Convert to fraction form
   680,388/1,426,386 = 1,426,386/x
3. Step 3: Cross multiply
   680,388x = 1,426,386 × 1,426,386
4. Step 4: Simplify right side
   680,388x = 2,034,577,020,996
5. Step 5: Solve for x
   x = 2,034,577,020,996/680,388
6. Step 6: Final answer
   x = 2,990,318.79