Finding the Third Proportional to 1,807,386 and 3,912,309

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807,386 : 3,912,309 = 3,912,309 : x
2. Step 2: Convert to fraction form
   1,807,386/3,912,309 = 3,912,309/x
3. Step 3: Cross multiply
   1,807,386x = 3,912,309 × 3,912,309
4. Step 4: Simplify right side
   1,807,386x = 15,306,161,711,481
5. Step 5: Solve for x
   x = 15,306,161,711,481/1,807,386
6. Step 6: Final answer
   x = 8,468,673.38