Finding the Fourth Proportional to 3,684.48, 5,487.69 and 3,666.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,684.48 : 5,487.69 = 3,666.54 : x
2. Step 2: Convert to fraction form
   3,684.48/5,487.69 = 3,666.54/x
3. Step 3: Cross multiply
   3,684.48x = 5,487.69 × 3,666.54
4. Step 4: Simplify right side
   3,684.48x = 20,120,834.89
5. Step 5: Solve for x
   x = 20,120,834.89/3,684.48
6. Step 6: Final answer
   x = 5,460.97