Finding the Fourth Proportional to 3,111.09, 4,667.63 and 919.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.09 : 4,667.63 = 919.83 : x
2. Step 2: Convert to fraction form
   3,111.09/4,667.63 = 919.83/x
3. Step 3: Cross multiply
   3,111.09x = 4,667.63 × 919.83
4. Step 4: Simplify right side
   3,111.09x = 4,293,421.50
5. Step 5: Solve for x
   x = 4,293,421.50/3,111.09
6. Step 6: Final answer
   x = 1,380.04