Finding the Fourth Proportional to 2,612.57, 3,605.31 and 1,433.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.57 : 3,605.31 = 1,433.63 : x
2. Step 2: Convert to fraction form
   2,612.57/3,605.31 = 1,433.63/x
3. Step 3: Cross multiply
   2,612.57x = 3,605.31 × 1,433.63
4. Step 4: Simplify right side
   2,612.57x = 5,168,662.55
5. Step 5: Solve for x
   x = 5,168,662.55/2,612.57
6. Step 6: Final answer
   x = 1,978.39