Finding the Third Proportional to 386,866 and 840,145.50

Step by Step Solution

1. Step 1: Write the proportion equation
   386,866 : 840,145.50 = 840,145.50 : x
2. Step 2: Convert to fraction form
   386,866/840,145.50 = 840,145.50/x
3. Step 3: Cross multiply
   386,866x = 840,145.50 × 840,145.50
4. Step 4: Simplify right side
   386,866x = 705,844,461,170.25
5. Step 5: Solve for x
   x = 705,844,461,170.25/386,866
6. Step 6: Final answer
   x = 1,824,519.24