Finding the Fourth Proportional to 3,667.64, 5,501.78 and 1,718.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.64 : 5,501.78 = 1,718.80 : x
2. Step 2: Convert to fraction form
   3,667.64/5,501.78 = 1,718.80/x
3. Step 3: Cross multiply
   3,667.64x = 5,501.78 × 1,718.80
4. Step 4: Simplify right side
   3,667.64x = 9,456,459.46
5. Step 5: Solve for x
   x = 9,456,459.46/3,667.64
6. Step 6: Final answer
   x = 2,578.35