Finding the Fourth Proportional to 2,612.09, 3,604.78 and 1,433.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.09 : 3,604.78 = 1,433.20 : x
2. Step 2: Convert to fraction form
   2,612.09/3,604.78 = 1,433.20/x
3. Step 3: Cross multiply
   2,612.09x = 3,604.78 × 1,433.20
4. Step 4: Simplify right side
   2,612.09x = 5,166,363.48
5. Step 5: Solve for x
   x = 5,166,363.48/2,612.09
6. Step 6: Final answer
   x = 1,977.86