Finding the Fourth Proportional to 2,612.87, 3,605.81 and 1,434

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.87 : 3,605.81 = 1,434 : x
2. Step 2: Convert to fraction form
   2,612.87/3,605.81 = 1,434/x
3. Step 3: Cross multiply
   2,612.87x = 3,605.81 × 1,434
4. Step 4: Simplify right side
   2,612.87x = 5,170,724.37
5. Step 5: Solve for x
   x = 5,170,724.37/2,612.87
6. Step 6: Final answer
   x = 1,978.95