Finding the Fourth Proportional to 3,661.50, 5,457.48 and 3,448.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,661.50 : 5,457.48 = 3,448.47 : x
2. Step 2: Convert to fraction form
   3,661.50/5,457.48 = 3,448.47/x
3. Step 3: Cross multiply
   3,661.50x = 5,457.48 × 3,448.47
4. Step 4: Simplify right side
   3,661.50x = 18,819,956.06
5. Step 5: Solve for x
   x = 18,819,956.06/3,661.50
6. Step 6: Final answer
   x = 5,139.96