Finding the Fourth Proportional to 2,290.77, 3,156.23 and 1,618.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.77 : 3,156.23 = 1,618.27 : x
2. Step 2: Convert to fraction form
   2,290.77/3,156.23 = 1,618.27/x
3. Step 3: Cross multiply
   2,290.77x = 3,156.23 × 1,618.27
4. Step 4: Simplify right side
   2,290.77x = 5,107,632.32
5. Step 5: Solve for x
   x = 5,107,632.32/2,290.77
6. Step 6: Final answer
   x = 2,229.66