Finding the Fourth Proportional to 2,571.39, 3,539.61 and 2,218.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.39 : 3,539.61 = 2,218.50 : x
2. Step 2: Convert to fraction form
   2,571.39/3,539.61 = 2,218.50/x
3. Step 3: Cross multiply
   2,571.39x = 3,539.61 × 2,218.50
4. Step 4: Simplify right side
   2,571.39x = 7,852,624.79
5. Step 5: Solve for x
   x = 7,852,624.79/2,571.39
6. Step 6: Final answer
   x = 3,053.84