Finding the Fourth Proportional to 2,667.61, 3,680.69 and 1,605.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.61 : 3,680.69 = 1,605.09 : x
2. Step 2: Convert to fraction form
   2,667.61/3,680.69 = 1,605.09/x
3. Step 3: Cross multiply
   2,667.61x = 3,680.69 × 1,605.09
4. Step 4: Simplify right side
   2,667.61x = 5,907,838.71
5. Step 5: Solve for x
   x = 5,907,838.71/2,667.61
6. Step 6: Final answer
   x = 2,214.66