Finding the Third Proportional to 646,585 and 1,405,091

Step by Step Solution

1. Step 1: Write the proportion equation
   646,585 : 1,405,091 = 1,405,091 : x
2. Step 2: Convert to fraction form
   646,585/1,405,091 = 1,405,091/x
3. Step 3: Cross multiply
   646,585x = 1,405,091 × 1,405,091
4. Step 4: Simplify right side
   646,585x = 1,974,280,718,281
5. Step 5: Solve for x
   x = 1,974,280,718,281/646,585
6. Step 6: Final answer
   x = 3,053,397.03