Finding the Fourth Proportional to 2,612.04, 3,919.62 and 1,380.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.04 : 3,919.62 = 1,380.30 : x
2. Step 2: Convert to fraction form
   2,612.04/3,919.62 = 1,380.30/x
3. Step 3: Cross multiply
   2,612.04x = 3,919.62 × 1,380.30
4. Step 4: Simplify right side
   2,612.04x = 5,410,251.49
5. Step 5: Solve for x
   x = 5,410,251.49/2,612.04
6. Step 6: Final answer
   x = 2,071.27