Finding the Fourth Proportional to 3,404.69, 5,105.96 and 1,212.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,404.69 : 5,105.96 = 1,212.83 : x
2. Step 2: Convert to fraction form
   3,404.69/5,105.96 = 1,212.83/x
3. Step 3: Cross multiply
   3,404.69x = 5,105.96 × 1,212.83
4. Step 4: Simplify right side
   3,404.69x = 6,192,655.40
5. Step 5: Solve for x
   x = 6,192,655.40/3,404.69
6. Step 6: Final answer
   x = 1,818.86