Finding the Third Proportional to 689,636 and 1,076,376

Step by Step Solution

1. Step 1: Write the proportion equation
   689,636 : 1,076,376 = 1,076,376 : x
2. Step 2: Convert to fraction form
   689,636/1,076,376 = 1,076,376/x
3. Step 3: Cross multiply
   689,636x = 1,076,376 × 1,076,376
4. Step 4: Simplify right side
   689,636x = 1,158,585,293,376
5. Step 5: Solve for x
   x = 1,158,585,293,376/689,636
6. Step 6: Final answer
   x = 1,679,995.38