Finding the Fourth Proportional to 3,426.72, 5,139 and 1,478.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.72 : 5,139 = 1,478.46 : x
2. Step 2: Convert to fraction form
   3,426.72/5,139 = 1,478.46/x
3. Step 3: Cross multiply
   3,426.72x = 5,139 × 1,478.46
4. Step 4: Simplify right side
   3,426.72x = 7,597,805.94
5. Step 5: Solve for x
   x = 7,597,805.94/3,426.72
6. Step 6: Final answer
   x = 2,217.22