Finding the Third Proportional to 390,628,126.13 and 834,978,510

Step by Step Solution

1. Step 1: Write the proportion equation
   390,628,126.13 : 834,978,510 = 834,978,510 : x
2. Step 2: Convert to fraction form
   390,628,126.13/834,978,510 = 834,978,510/x
3. Step 3: Cross multiply
   390,628,126.13x = 834,978,510 × 834,978,510
4. Step 4: Simplify right side
   390,628,126.13x = 697,189,112,161,820,160
5. Step 5: Solve for x
   x = 697,189,112,161,820,160/390,628,126.13
6. Step 6: Final answer
   x = 1,784,789,843.68