Finding the Fourth Proportional to 2,298.78, 3,170.98 and 1,668.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,298.78 : 3,170.98 = 1,668.58 : x
2. Step 2: Convert to fraction form
   2,298.78/3,170.98 = 1,668.58/x
3. Step 3: Cross multiply
   2,298.78x = 3,170.98 × 1,668.58
4. Step 4: Simplify right side
   2,298.78x = 5,291,033.81
5. Step 5: Solve for x
   x = 5,291,033.81/2,298.78
6. Step 6: Final answer
   x = 2,301.67