Finding the Fourth Proportional to 2,612.71, 3,605.57 and 1,433.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.71 : 3,605.57 = 1,433.80 : x
2. Step 2: Convert to fraction form
   2,612.71/3,605.57 = 1,433.80/x
3. Step 3: Cross multiply
   2,612.71x = 3,605.57 × 1,433.80
4. Step 4: Simplify right side
   2,612.71x = 5,169,666.27
5. Step 5: Solve for x
   x = 5,169,666.27/2,612.71
6. Step 6: Final answer
   x = 1,978.66