Finding the Fourth Proportional to 2,611.28, 3,912.51 and 1,293.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.28 : 3,912.51 = 1,293.27 : x
2. Step 2: Convert to fraction form
   2,611.28/3,912.51 = 1,293.27/x
3. Step 3: Cross multiply
   2,611.28x = 3,912.51 × 1,293.27
4. Step 4: Simplify right side
   2,611.28x = 5,059,931.81
5. Step 5: Solve for x
   x = 5,059,931.81/2,611.28
6. Step 6: Final answer
   x = 1,937.72