Finding the Third Proportional to 646,258 and 1,380,480

Step by Step Solution

1. Step 1: Write the proportion equation
   646,258 : 1,380,480 = 1,380,480 : x
2. Step 2: Convert to fraction form
   646,258/1,380,480 = 1,380,480/x
3. Step 3: Cross multiply
   646,258x = 1,380,480 × 1,380,480
4. Step 4: Simplify right side
   646,258x = 1,905,725,030,400
5. Step 5: Solve for x
   x = 1,905,725,030,400/646,258
6. Step 6: Final answer
   x = 2,948,861.03