Finding the Third Proportional to 1,239,616 and 1,915,488

Step by Step Solution

1. Step 1: Write the proportion equation
   1,239,616 : 1,915,488 = 1,915,488 : x
2. Step 2: Convert to fraction form
   1,239,616/1,915,488 = 1,915,488/x
3. Step 3: Cross multiply
   1,239,616x = 1,915,488 × 1,915,488
4. Step 4: Simplify right side
   1,239,616x = 3,669,094,278,144
5. Step 5: Solve for x
   x = 3,669,094,278,144/1,239,616
6. Step 6: Final answer
   x = 2,959,863.60