Finding the Fourth Proportional to 19,404.90, 29,057.91 and 12,810.96

Step by Step Solution

1. Step 1: Write the proportion equation
   19,404.90 : 29,057.91 = 12,810.96 : x
2. Step 2: Convert to fraction form
   19,404.90/29,057.91 = 12,810.96/x
3. Step 3: Cross multiply
   19,404.90x = 29,057.91 × 12,810.96
4. Step 4: Simplify right side
   19,404.90x = 372,259,722.69
5. Step 5: Solve for x
   x = 372,259,722.69/19,404.90
6. Step 6: Final answer
   x = 19,183.80