Finding the Third Proportional to 1,389,715 and 2,076,389

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,715 : 2,076,389 = 2,076,389 : x
2. Step 2: Convert to fraction form
   1,389,715/2,076,389 = 2,076,389/x
3. Step 3: Cross multiply
   1,389,715x = 2,076,389 × 2,076,389
4. Step 4: Simplify right side
   1,389,715x = 4,311,391,279,321
5. Step 5: Solve for x
   x = 4,311,391,279,321/1,389,715
6. Step 6: Final answer
   x = 3,102,356.44