Finding the Fourth Proportional to 3,388.16, 4,679.31 and 2,328.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,388.16 : 4,679.31 = 2,328.72 : x
2. Step 2: Convert to fraction form
   3,388.16/4,679.31 = 2,328.72/x
3. Step 3: Cross multiply
   3,388.16x = 4,679.31 × 2,328.72
4. Step 4: Simplify right side
   3,388.16x = 10,896,802.78
5. Step 5: Solve for x
   x = 10,896,802.78/3,388.16
6. Step 6: Final answer
   x = 3,216.15