Finding the Third Proportional to 770,421 and 1,109,711

Step by Step Solution

1. Step 1: Write the proportion equation
   770,421 : 1,109,711 = 1,109,711 : x
2. Step 2: Convert to fraction form
   770,421/1,109,711 = 1,109,711/x
3. Step 3: Cross multiply
   770,421x = 1,109,711 × 1,109,711
4. Step 4: Simplify right side
   770,421x = 1,231,458,503,521
5. Step 5: Solve for x
   x = 1,231,458,503,521/770,421
6. Step 6: Final answer
   x = 1,598,422.81