Finding the Third Proportional to 643,338,474 and 1,404,657,399

Step by Step Solution

1. Step 1: Write the proportion equation
   643,338,474 : 1,404,657,399 = 1,404,657,399 : x
2. Step 2: Convert to fraction form
   643,338,474/1,404,657,399 = 1,404,657,399/x
3. Step 3: Cross multiply
   643,338,474x = 1,404,657,399 × 1,404,657,399
4. Step 4: Simplify right side
   643,338,474x = 1,973,062,408,565,445,120
5. Step 5: Solve for x
   x = 1,973,062,408,565,445,120/643,338,474
6. Step 6: Final answer
   x = 3,066,911,879.68