Finding the Fourth Proportional to 1,667.93, 2,501.55 and 680.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.93 : 2,501.55 = 680.49 : x
2. Step 2: Convert to fraction form
   1,667.93/2,501.55 = 680.49/x
3. Step 3: Cross multiply
   1,667.93x = 2,501.55 × 680.49
4. Step 4: Simplify right side
   1,667.93x = 1,702,279.76
5. Step 5: Solve for x
   x = 1,702,279.76/1,667.93
6. Step 6: Final answer
   x = 1,020.60