Finding the Fourth Proportional to 2,113.79, 2,916.69 and 1,327.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.79 : 2,916.69 = 1,327.28 : x
2. Step 2: Convert to fraction form
   2,113.79/2,916.69 = 1,327.28/x
3. Step 3: Cross multiply
   2,113.79x = 2,916.69 × 1,327.28
4. Step 4: Simplify right side
   2,113.79x = 3,871,264.30
5. Step 5: Solve for x
   x = 3,871,264.30/2,113.79
6. Step 6: Final answer
   x = 1,831.43