Finding the Third Proportional to 1,076,840 and 1,689,480

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076,840 : 1,689,480 = 1,689,480 : x
2. Step 2: Convert to fraction form
   1,076,840/1,689,480 = 1,689,480/x
3. Step 3: Cross multiply
   1,076,840x = 1,689,480 × 1,689,480
4. Step 4: Simplify right side
   1,076,840x = 2,854,342,670,400
5. Step 5: Solve for x
   x = 2,854,342,670,400/1,076,840
6. Step 6: Final answer
   x = 2,650,665.53