Finding the Fourth Proportional to 3,728.39, 5,564.66 and 3,666.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,728.39 : 5,564.66 = 3,666.87 : x
2. Step 2: Convert to fraction form
   3,728.39/5,564.66 = 3,666.87/x
3. Step 3: Cross multiply
   3,728.39x = 5,564.66 × 3,666.87
4. Step 4: Simplify right side
   3,728.39x = 20,404,866.48
5. Step 5: Solve for x
   x = 20,404,866.48/3,728.39
6. Step 6: Final answer
   x = 5,472.84