Finding the Fourth Proportional to 2,606.18, 3,909.06 and 1,219.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.18 : 3,909.06 = 1,219.15 : x
2. Step 2: Convert to fraction form
   2,606.18/3,909.06 = 1,219.15/x
3. Step 3: Cross multiply
   2,606.18x = 3,909.06 × 1,219.15
4. Step 4: Simplify right side
   2,606.18x = 4,765,735.39
5. Step 5: Solve for x
   x = 4,765,735.39/2,606.18
6. Step 6: Final answer
   x = 1,828.63