Finding the Third Proportional to 847,810 and 1,280,355

Step by Step Solution

1. Step 1: Write the proportion equation
   847,810 : 1,280,355 = 1,280,355 : x
2. Step 2: Convert to fraction form
   847,810/1,280,355 = 1,280,355/x
3. Step 3: Cross multiply
   847,810x = 1,280,355 × 1,280,355
4. Step 4: Simplify right side
   847,810x = 1,639,308,926,025
5. Step 5: Solve for x
   x = 1,639,308,926,025/847,810
6. Step 6: Final answer
   x = 1,933,580.55