Finding the Third Proportional to 646,400,790 and 1,002,947,466

Step by Step Solution

1. Step 1: Write the proportion equation
   646,400,790 : 1,002,947,466 = 1,002,947,466 : x
2. Step 2: Convert to fraction form
   646,400,790/1,002,947,466 = 1,002,947,466/x
3. Step 3: Cross multiply
   646,400,790x = 1,002,947,466 × 1,002,947,466
4. Step 4: Simplify right side
   646,400,790x = 1,005,903,619,555,821,184
5. Step 5: Solve for x
   x = 1,005,903,619,555,821,184/646,400,790
6. Step 6: Final answer
   x = 1,556,160,875.91