Finding the Third Proportional to 838,909 and 1,258,454

Step by Step Solution

1. Step 1: Write the proportion equation
   838,909 : 1,258,454 = 1,258,454 : x
2. Step 2: Convert to fraction form
   838,909/1,258,454 = 1,258,454/x
3. Step 3: Cross multiply
   838,909x = 1,258,454 × 1,258,454
4. Step 4: Simplify right side
   838,909x = 1,583,706,470,116
5. Step 5: Solve for x
   x = 1,583,706,470,116/838,909
6. Step 6: Final answer
   x = 1,887,816.76