Finding the Fourth Proportional to 2,144.68, 3,215.94 and 1,047.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.68 : 3,215.94 = 1,047.40 : x
2. Step 2: Convert to fraction form
   2,144.68/3,215.94 = 1,047.40/x
3. Step 3: Cross multiply
   2,144.68x = 3,215.94 × 1,047.40
4. Step 4: Simplify right side
   2,144.68x = 3,368,375.56
5. Step 5: Solve for x
   x = 3,368,375.56/2,144.68
6. Step 6: Final answer
   x = 1,570.57