Finding the Third Proportional to 689,410 and 1,489,502

Step by Step Solution

1. Step 1: Write the proportion equation
   689,410 : 1,489,502 = 1,489,502 : x
2. Step 2: Convert to fraction form
   689,410/1,489,502 = 1,489,502/x
3. Step 3: Cross multiply
   689,410x = 1,489,502 × 1,489,502
4. Step 4: Simplify right side
   689,410x = 2,218,616,208,004
5. Step 5: Solve for x
   x = 2,218,616,208,004/689,410
6. Step 6: Final answer
   x = 3,218,137.55