Finding the Fourth Proportional to 2,667.96, 3,680.12 and 1,920.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.96 : 3,680.12 = 1,920.74 : x
2. Step 2: Convert to fraction form
   2,667.96/3,680.12 = 1,920.74/x
3. Step 3: Cross multiply
   2,667.96x = 3,680.12 × 1,920.74
4. Step 4: Simplify right side
   2,667.96x = 7,068,525.68
5. Step 5: Solve for x
   x = 7,068,525.68/2,667.96
6. Step 6: Final answer
   x = 2,649.41