Finding the Fourth Proportional to 2,667.78, 3,680.91 and 1,619.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.78 : 3,680.91 = 1,619.64 : x
2. Step 2: Convert to fraction form
   2,667.78/3,680.91 = 1,619.64/x
3. Step 3: Cross multiply
   2,667.78x = 3,680.91 × 1,619.64
4. Step 4: Simplify right side
   2,667.78x = 5,961,749.07
5. Step 5: Solve for x
   x = 5,961,749.07/2,667.78
6. Step 6: Final answer
   x = 2,234.72