Finding the Fourth Proportional to 2,456.76, 3,390.30 and 1,618.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.76 : 3,390.30 = 1,618.68 : x
2. Step 2: Convert to fraction form
   2,456.76/3,390.30 = 1,618.68/x
3. Step 3: Cross multiply
   2,456.76x = 3,390.30 × 1,618.68
4. Step 4: Simplify right side
   2,456.76x = 5,487,810.80
5. Step 5: Solve for x
   x = 5,487,810.80/2,456.76
6. Step 6: Final answer
   x = 2,233.76