Finding the Fourth Proportional to 3,404.89, 5,106.30 and 1,213.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,404.89 : 5,106.30 = 1,213.10 : x
2. Step 2: Convert to fraction form
   3,404.89/5,106.30 = 1,213.10/x
3. Step 3: Cross multiply
   3,404.89x = 5,106.30 × 1,213.10
4. Step 4: Simplify right side
   3,404.89x = 6,194,464.49
5. Step 5: Solve for x
   x = 6,194,464.49/3,404.89
6. Step 6: Final answer
   x = 1,819.29