Finding the Third Proportional to 5,259,870 and 7,889,805

Step by Step Solution

1. Step 1: Write the proportion equation
   5,259,870 : 7,889,805 = 7,889,805 : x
2. Step 2: Convert to fraction form
   5,259,870/7,889,805 = 7,889,805/x
3. Step 3: Cross multiply
   5,259,870x = 7,889,805 × 7,889,805
4. Step 4: Simplify right side
   5,259,870x = 62,249,022,938,025
5. Step 5: Solve for x
   x = 62,249,022,938,025/5,259,870
6. Step 6: Final answer
   x = 11,834,707.50