Finding the Third Proportional to 390,628,143.75 and 834,978,544.50

Step by Step Solution

1. Step 1: Write the proportion equation
   390,628,143.75 : 834,978,544.50 = 834,978,544.50 : x
2. Step 2: Convert to fraction form
   390,628,143.75/834,978,544.50 = 834,978,544.50/x
3. Step 3: Cross multiply
   390,628,143.75x = 834,978,544.50 × 834,978,544.50
4. Step 4: Simplify right side
   390,628,143.75x = 697,189,169,775,338,496
5. Step 5: Solve for x
   x = 697,189,169,775,338,496/390,628,143.75
6. Step 6: Final answer
   x = 1,784,789,910.64