Finding the Fourth Proportional to 3,669.22, 5,500.50 and 1,328.68

Step by Step Solution

1. Step 1: Write the proportion equation
   3,669.22 : 5,500.50 = 1,328.68 : x
2. Step 2: Convert to fraction form
   3,669.22/5,500.50 = 1,328.68/x
3. Step 3: Cross multiply
   3,669.22x = 5,500.50 × 1,328.68
4. Step 4: Simplify right side
   3,669.22x = 7,308,404.34
5. Step 5: Solve for x
   x = 7,308,404.34/3,669.22
6. Step 6: Final answer
   x = 1,991.81