Finding the Fourth Proportional to 3,931,608,757.33, 5,897,435,183.78 and 1,311,405,669.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931,608,757.33 : 5,897,435,183.78 = 1,311,405,669.05 : x
2. Step 2: Convert to fraction form
   3,931,608,757.33/5,897,435,183.78 = 1,311,405,669.05/x
3. Step 3: Cross multiply
   3,931,608,757.33x = 5,897,435,183.78 × 1,311,405,669.05
4. Step 4: Simplify right side
   3,931,608,757.33x = 7,733,929,932,857,462,784
5. Step 5: Solve for x
   x = 7,733,929,932,857,462,784/3,931,608,757.33
6. Step 6: Final answer
   x = 1,967,115,857.71