Finding the Fourth Proportional to 2,158,408,736.31, 3,237,921,946.46 and 664,566,676.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,408,736.31 : 3,237,921,946.46 = 664,566,676.13 : x
2. Step 2: Convert to fraction form
   2,158,408,736.31/3,237,921,946.46 = 664,566,676.13/x
3. Step 3: Cross multiply
   2,158,408,736.31x = 3,237,921,946.46 × 664,566,676.13
4. Step 4: Simplify right side
   2,158,408,736.31x = 2,151,815,025,507,789,568
5. Step 5: Solve for x
   x = 2,151,815,025,507,789,568/2,158,408,736.31
6. Step 6: Final answer
   x = 996,945,105.58