Finding the Fourth Proportional to 2,143.35, 3,216.09 and 1,047.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.35 : 3,216.09 = 1,047.69 : x
2. Step 2: Convert to fraction form
   2,143.35/3,216.09 = 1,047.69/x
3. Step 3: Cross multiply
   2,143.35x = 3,216.09 × 1,047.69
4. Step 4: Simplify right side
   2,143.35x = 3,369,465.33
5. Step 5: Solve for x
   x = 3,369,465.33/2,143.35
6. Step 6: Final answer
   x = 1,572.06