Finding the Third Proportional to 689,634 and 1,076,373

Step by Step Solution

1. Step 1: Write the proportion equation
   689,634 : 1,076,373 = 1,076,373 : x
2. Step 2: Convert to fraction form
   689,634/1,076,373 = 1,076,373/x
3. Step 3: Cross multiply
   689,634x = 1,076,373 × 1,076,373
4. Step 4: Simplify right side
   689,634x = 1,158,578,835,129
5. Step 5: Solve for x
   x = 1,158,578,835,129/689,634
6. Step 6: Final answer
   x = 1,679,990.89