Finding the Fourth Proportional to 3,669.10, 5,149.70 and 3,669.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,669.10 : 5,149.70 = 3,669.10 : x
2. Step 2: Convert to fraction form
   3,669.10/5,149.70 = 3,669.10/x
3. Step 3: Cross multiply
   3,669.10x = 5,149.70 × 3,669.10
4. Step 4: Simplify right side
   3,669.10x = 18,894,764.27
5. Step 5: Solve for x
   x = 18,894,764.27/3,669.10
6. Step 6: Final answer
   x = 5,149.70