Finding the Third Proportional to 1,291,384 and 2,815,286

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,384 : 2,815,286 = 2,815,286 : x
2. Step 2: Convert to fraction form
   1,291,384/2,815,286 = 2,815,286/x
3. Step 3: Cross multiply
   1,291,384x = 2,815,286 × 2,815,286
4. Step 4: Simplify right side
   1,291,384x = 7,925,835,261,796
5. Step 5: Solve for x
   x = 7,925,835,261,796/1,291,384
6. Step 6: Final answer
   x = 6,137,473.64