Finding the Fourth Proportional to 2,391.72, 3,580.89 and 1,292.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.72 : 3,580.89 = 1,292.14 : x
2. Step 2: Convert to fraction form
   2,391.72/3,580.89 = 1,292.14/x
3. Step 3: Cross multiply
   2,391.72x = 3,580.89 × 1,292.14
4. Step 4: Simplify right side
   2,391.72x = 4,627,011.20
5. Step 5: Solve for x
   x = 4,627,011.20/2,391.72
6. Step 6: Final answer
   x = 1,934.60