Finding the Fourth Proportional to 21,243,057.85, 29,310,380.98 and 12,074,978.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,243,057.85 : 29,310,380.98 = 12,074,978.89 : x
2. Step 2: Convert to fraction form
   21,243,057.85/29,310,380.98 = 12,074,978.89/x
3. Step 3: Cross multiply
   21,243,057.85x = 29,310,380.98 × 12,074,978.89
4. Step 4: Simplify right side
   21,243,057.85x = 353,922,231,591,357.56
5. Step 5: Solve for x
   x = 353,922,231,591,357.56/21,243,057.85
6. Step 6: Final answer
   x = 16,660,606.68