Finding the Fourth Proportional to 3,690.50, 5,531.37 and 3,649.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.50 : 5,531.37 = 3,649.38 : x
2. Step 2: Convert to fraction form
   3,690.50/5,531.37 = 3,649.38/x
3. Step 3: Cross multiply
   3,690.50x = 5,531.37 × 3,649.38
4. Step 4: Simplify right side
   3,690.50x = 20,186,071.05
5. Step 5: Solve for x
   x = 20,186,071.05/3,690.50
6. Step 6: Final answer
   x = 5,469.75