Finding the Fourth Proportional to 1,667.16, 2,501.70 and 680.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.16 : 2,501.70 = 680.16 : x
2. Step 2: Convert to fraction form
   1,667.16/2,501.70 = 680.16/x
3. Step 3: Cross multiply
   1,667.16x = 2,501.70 × 680.16
4. Step 4: Simplify right side
   1,667.16x = 1,701,556.27
5. Step 5: Solve for x
   x = 1,701,556.27/1,667.16
6. Step 6: Final answer
   x = 1,020.63