Finding the Fourth Proportional to 1,668.38, 2,500.54 and 1,256.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,668.38 : 2,500.54 = 1,256.18 : x
2. Step 2: Convert to fraction form
   1,668.38/2,500.54 = 1,256.18/x
3. Step 3: Cross multiply
   1,668.38x = 2,500.54 × 1,256.18
4. Step 4: Simplify right side
   1,668.38x = 3,141,128.34
5. Step 5: Solve for x
   x = 3,141,128.34/1,668.38
6. Step 6: Final answer
   x = 1,882.74