Finding the Fourth Proportional to 2,143.89, 3,216.20 and 1,048.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.89 : 3,216.20 = 1,048.32 : x
2. Step 2: Convert to fraction form
   2,143.89/3,216.20 = 1,048.32/x
3. Step 3: Cross multiply
   2,143.89x = 3,216.20 × 1,048.32
4. Step 4: Simplify right side
   2,143.89x = 3,371,601.54
5. Step 5: Solve for x
   x = 3,371,601.54/2,143.89
6. Step 6: Final answer
   x = 1,572.66