Finding the Third Proportional to 851,786 and 1,728,602

Step by Step Solution

1. Step 1: Write the proportion equation
   851,786 : 1,728,602 = 1,728,602 : x
2. Step 2: Convert to fraction form
   851,786/1,728,602 = 1,728,602/x
3. Step 3: Cross multiply
   851,786x = 1,728,602 × 1,728,602
4. Step 4: Simplify right side
   851,786x = 2,988,064,874,404
5. Step 5: Solve for x
   x = 2,988,064,874,404/851,786
6. Step 6: Final answer
   x = 3,507,999.51