Finding the Fourth Proportional to 2,667.12, 4,001.16 and 912.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.12 : 4,001.16 = 912.32 : x
2. Step 2: Convert to fraction form
   2,667.12/4,001.16 = 912.32/x
3. Step 3: Cross multiply
   2,667.12x = 4,001.16 × 912.32
4. Step 4: Simplify right side
   2,667.12x = 3,650,334.87
5. Step 5: Solve for x
   x = 3,650,334.87/2,667.12
6. Step 6: Final answer
   x = 1,368.64