Finding the Fourth Proportional to 2,667.47, 3,999.13 and 911.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.47 : 3,999.13 = 911.34 : x
2. Step 2: Convert to fraction form
   2,667.47/3,999.13 = 911.34/x
3. Step 3: Cross multiply
   2,667.47x = 3,999.13 × 911.34
4. Step 4: Simplify right side
   2,667.47x = 3,644,564.86
5. Step 5: Solve for x
   x = 3,644,564.86/2,667.47
6. Step 6: Final answer
   x = 1,366.30