Finding the Third Proportional to 851,784 and 1,728,598

Step by Step Solution

1. Step 1: Write the proportion equation
   851,784 : 1,728,598 = 1,728,598 : x
2. Step 2: Convert to fraction form
   851,784/1,728,598 = 1,728,598/x
3. Step 3: Cross multiply
   851,784x = 1,728,598 × 1,728,598
4. Step 4: Simplify right side
   851,784x = 2,988,051,045,604
5. Step 5: Solve for x
   x = 2,988,051,045,604/851,784
6. Step 6: Final answer
   x = 3,507,991.52