Finding the Third Proportional to 1,388,664 and 2,815,965

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,664 : 2,815,965 = 2,815,965 : x
2. Step 2: Convert to fraction form
   1,388,664/2,815,965 = 2,815,965/x
3. Step 3: Cross multiply
   1,388,664x = 2,815,965 × 2,815,965
4. Step 4: Simplify right side
   1,388,664x = 7,929,658,881,225
5. Step 5: Solve for x
   x = 7,929,658,881,225/1,388,664
6. Step 6: Final answer
   x = 5,710,279.00