Finding the Third Proportional to 371,280,819 and 786,820,485

Step by Step Solution

1. Step 1: Write the proportion equation
   371,280,819 : 786,820,485 = 786,820,485 : x
2. Step 2: Convert to fraction form
   371,280,819/786,820,485 = 786,820,485/x
3. Step 3: Cross multiply
   371,280,819x = 786,820,485 × 786,820,485
4. Step 4: Simplify right side
   371,280,819x = 619,086,475,615,635,200
5. Step 5: Solve for x
   x = 619,086,475,615,635,200/371,280,819
6. Step 6: Final answer
   x = 1,667,434,577.64