Finding the Fourth Proportional to 2,138.03, 3,208.66 and 1,443.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,138.03 : 3,208.66 = 1,443.05 : x
2. Step 2: Convert to fraction form
   2,138.03/3,208.66 = 1,443.05/x
3. Step 3: Cross multiply
   2,138.03x = 3,208.66 × 1,443.05
4. Step 4: Simplify right side
   2,138.03x = 4,630,256.81
5. Step 5: Solve for x
   x = 4,630,256.81/2,138.03
6. Step 6: Final answer
   x = 2,165.67