Finding the Third Proportional to 687,639 and 1,051,226

Step by Step Solution

1. Step 1: Write the proportion equation
   687,639 : 1,051,226 = 1,051,226 : x
2. Step 2: Convert to fraction form
   687,639/1,051,226 = 1,051,226/x
3. Step 3: Cross multiply
   687,639x = 1,051,226 × 1,051,226
4. Step 4: Simplify right side
   687,639x = 1,105,076,103,076
5. Step 5: Solve for x
   x = 1,105,076,103,076/687,639
6. Step 6: Final answer
   x = 1,607,058.50