Finding the Fourth Proportional to 2,347.20, 3,215.07 and 2,340.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,347.20 : 3,215.07 = 2,340.72 : x
2. Step 2: Convert to fraction form
   2,347.20/3,215.07 = 2,340.72/x
3. Step 3: Cross multiply
   2,347.20x = 3,215.07 × 2,340.72
4. Step 4: Simplify right side
   2,347.20x = 7,525,578.65
5. Step 5: Solve for x
   x = 7,525,578.65/2,347.20
6. Step 6: Final answer
   x = 3,206.19