Finding the Fourth Proportional to 2,143.81, 3,216.12 and 1,479.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.81 : 3,216.12 = 1,479.52 : x
2. Step 2: Convert to fraction form
   2,143.81/3,216.12 = 1,479.52/x
3. Step 3: Cross multiply
   2,143.81x = 3,216.12 × 1,479.52
4. Step 4: Simplify right side
   2,143.81x = 4,758,313.86
5. Step 5: Solve for x
   x = 4,758,313.86/2,143.81
6. Step 6: Final answer
   x = 2,219.56