Finding the Third Proportional to 411,510 and 842,087.50

Step by Step Solution

1. Step 1: Write the proportion equation
   411,510 : 842,087.50 = 842,087.50 : x
2. Step 2: Convert to fraction form
   411,510/842,087.50 = 842,087.50/x
3. Step 3: Cross multiply
   411,510x = 842,087.50 × 842,087.50
4. Step 4: Simplify right side
   411,510x = 709,111,357,656.25
5. Step 5: Solve for x
   x = 709,111,357,656.25/411,510
6. Step 6: Final answer
   x = 1,723,193.50