Finding the Third Proportional to 5,608,810 and 8,403,711

Step by Step Solution

1. Step 1: Write the proportion equation
   5,608,810 : 8,403,711 = 8,403,711 : x
2. Step 2: Convert to fraction form
   5,608,810/8,403,711 = 8,403,711/x
3. Step 3: Cross multiply
   5,608,810x = 8,403,711 × 8,403,711
4. Step 4: Simplify right side
   5,608,810x = 70,622,358,571,521
5. Step 5: Solve for x
   x = 70,622,358,571,521/5,608,810
6. Step 6: Final answer
   x = 12,591,326.60