Finding the Fourth Proportional to 3,111.08, 4,667.52 and 919.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.08 : 4,667.52 = 919.76 : x
2. Step 2: Convert to fraction form
   3,111.08/4,667.52 = 919.76/x
3. Step 3: Cross multiply
   3,111.08x = 4,667.52 × 919.76
4. Step 4: Simplify right side
   3,111.08x = 4,292,998.20
5. Step 5: Solve for x
   x = 4,292,998.20/3,111.08
6. Step 6: Final answer
   x = 1,379.91