Finding the Fourth Proportional to 2,709.27, 4,061.63 and 1,321.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,709.27 : 4,061.63 = 1,321.89 : x
2. Step 2: Convert to fraction form
   2,709.27/4,061.63 = 1,321.89/x
3. Step 3: Cross multiply
   2,709.27x = 4,061.63 × 1,321.89
4. Step 4: Simplify right side
   2,709.27x = 5,369,021.47
5. Step 5: Solve for x
   x = 5,369,021.47/2,709.27
6. Step 6: Final answer
   x = 1,981.72