Finding the Fourth Proportional to 3,938,855,105.49, 5,435,603,793.32 and 2,130,368,994.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938,855,105.49 : 5,435,603,793.32 = 2,130,368,994.27 : x
2. Step 2: Convert to fraction form
   3,938,855,105.49/5,435,603,793.32 = 2,130,368,994.27/x
3. Step 3: Cross multiply
   3,938,855,105.49x = 5,435,603,793.32 × 2,130,368,994.27
4. Step 4: Simplify right side
   3,938,855,105.49x = 11,579,841,786,414,671,872
5. Step 5: Solve for x
   x = 11,579,841,786,414,671,872/3,938,855,105.49
6. Step 6: Final answer
   x = 2,939,900,421.90