Finding the Third Proportional to 489,348 and 689,100.75

Step by Step Solution

1. Step 1: Write the proportion equation
   489,348 : 689,100.75 = 689,100.75 : x
2. Step 2: Convert to fraction form
   489,348/689,100.75 = 689,100.75/x
3. Step 3: Cross multiply
   489,348x = 689,100.75 × 689,100.75
4. Step 4: Simplify right side
   489,348x = 474,859,843,650.56
5. Step 5: Solve for x
   x = 474,859,843,650.56/489,348
6. Step 6: Final answer
   x = 970,392.94