Finding the Fourth Proportional to 3,809.34, 5,672.38 and 3,669.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,809.34 : 5,672.38 = 3,669.21 : x
2. Step 2: Convert to fraction form
   3,809.34/5,672.38 = 3,669.21/x
3. Step 3: Cross multiply
   3,809.34x = 5,672.38 × 3,669.21
4. Step 4: Simplify right side
   3,809.34x = 20,813,135.07
5. Step 5: Solve for x
   x = 20,813,135.07/3,809.34
6. Step 6: Final answer
   x = 5,463.72