Finding the Fourth Proportional to 21,062,408.42, 29,057,467.82 and 12,801,139.85

Step by Step Solution

1. Step 1: Write the proportion equation
   21,062,408.42 : 29,057,467.82 = 12,801,139.85 : x
2. Step 2: Convert to fraction form
   21,062,408.42/29,057,467.82 = 12,801,139.85/x
3. Step 3: Cross multiply
   21,062,408.42x = 29,057,467.82 × 12,801,139.85
4. Step 4: Simplify right side
   21,062,408.42x = 371,968,709,041,401.62
5. Step 5: Solve for x
   x = 371,968,709,041,401.62/21,062,408.42
6. Step 6: Final answer
   x = 17,660,312.24