Finding the Third Proportional to 899,393 and 1,915,309

Step by Step Solution

1. Step 1: Write the proportion equation
   899,393 : 1,915,309 = 1,915,309 : x
2. Step 2: Convert to fraction form
   899,393/1,915,309 = 1,915,309/x
3. Step 3: Cross multiply
   899,393x = 1,915,309 × 1,915,309
4. Step 4: Simplify right side
   899,393x = 3,668,408,565,481
5. Step 5: Solve for x
   x = 3,668,408,565,481/899,393
6. Step 6: Final answer
   x = 4,078,760.41