Finding the Fourth Proportional to 2,612.77, 3,605.63 and 1,433.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.77 : 3,605.63 = 1,433.90 : x
2. Step 2: Convert to fraction form
   2,612.77/3,605.63 = 1,433.90/x
3. Step 3: Cross multiply
   2,612.77x = 3,605.63 × 1,433.90
4. Step 4: Simplify right side
   2,612.77x = 5,170,105.69
5. Step 5: Solve for x
   x = 5,170,105.69/2,612.77
6. Step 6: Final answer
   x = 1,978.79