Finding the Fourth Proportional to 3,667.47, 5,498.76 and 1,720.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.47 : 5,498.76 = 1,720.23 : x
2. Step 2: Convert to fraction form
   3,667.47/5,498.76 = 1,720.23/x
3. Step 3: Cross multiply
   3,667.47x = 5,498.76 × 1,720.23
4. Step 4: Simplify right side
   3,667.47x = 9,459,131.91
5. Step 5: Solve for x
   x = 9,459,131.91/3,667.47
6. Step 6: Final answer
   x = 2,579.20