Finding the Fourth Proportional to 3,015.60, 4,149.72 and 2,667.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,015.60 : 4,149.72 = 2,667.12 : x
2. Step 2: Convert to fraction form
   3,015.60/4,149.72 = 2,667.12/x
3. Step 3: Cross multiply
   3,015.60x = 4,149.72 × 2,667.12
4. Step 4: Simplify right side
   3,015.60x = 11,067,801.21
5. Step 5: Solve for x
   x = 11,067,801.21/3,015.60
6. Step 6: Final answer
   x = 3,670.18