Finding the Fourth Proportional to 3,426.32, 5,142.12 and 1,479.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.32 : 5,142.12 = 1,479.20 : x
2. Step 2: Convert to fraction form
   3,426.32/5,142.12 = 1,479.20/x
3. Step 3: Cross multiply
   3,426.32x = 5,142.12 × 1,479.20
4. Step 4: Simplify right side
   3,426.32x = 7,606,223.90
5. Step 5: Solve for x
   x = 7,606,223.90/3,426.32
6. Step 6: Final answer
   x = 2,219.94