Finding the Fourth Proportional to 2,571.86, 3,859.42 and 1,478.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.86 : 3,859.42 = 1,478.36 : x
2. Step 2: Convert to fraction form
   2,571.86/3,859.42 = 1,478.36/x
3. Step 3: Cross multiply
   2,571.86x = 3,859.42 × 1,478.36
4. Step 4: Simplify right side
   2,571.86x = 5,705,612.15
5. Step 5: Solve for x
   x = 5,705,612.15/2,571.86
6. Step 6: Final answer
   x = 2,218.48