Finding the Fourth Proportional to 3,666.50, 5,499.60 and 1,326.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,666.50 : 5,499.60 = 1,326.56 : x
2. Step 2: Convert to fraction form
   3,666.50/5,499.60 = 1,326.56/x
3. Step 3: Cross multiply
   3,666.50x = 5,499.60 × 1,326.56
4. Step 4: Simplify right side
   3,666.50x = 7,295,549.38
5. Step 5: Solve for x
   x = 7,295,549.38/3,666.50
6. Step 6: Final answer
   x = 1,989.79