Finding the Fourth Proportional to 3,111.04, 4,667.24 and 919.95

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.04 : 4,667.24 = 919.95 : x
2. Step 2: Convert to fraction form
   3,111.04/4,667.24 = 919.95/x
3. Step 3: Cross multiply
   3,111.04x = 4,667.24 × 919.95
4. Step 4: Simplify right side
   3,111.04x = 4,293,599.50
5. Step 5: Solve for x
   x = 4,293,599.50/3,111.04
6. Step 6: Final answer
   x = 1,380.12