Finding the Fourth Proportional to 2,215.34, 3,323.76 and 1,392.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.34 : 3,323.76 = 1,392.65 : x
2. Step 2: Convert to fraction form
   2,215.34/3,323.76 = 1,392.65/x
3. Step 3: Cross multiply
   2,215.34x = 3,323.76 × 1,392.65
4. Step 4: Simplify right side
   2,215.34x = 4,628,812.52
5. Step 5: Solve for x
   x = 4,628,812.52/2,215.34
6. Step 6: Final answer
   x = 2,089.44