Finding the Fourth Proportional to 3,726.33, 5,131.06 and 3,644.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,726.33 : 5,131.06 = 3,644.31 : x
2. Step 2: Convert to fraction form
   3,726.33/5,131.06 = 3,644.31/x
3. Step 3: Cross multiply
   3,726.33x = 5,131.06 × 3,644.31
4. Step 4: Simplify right side
   3,726.33x = 18,699,203.90
5. Step 5: Solve for x
   x = 18,699,203.90/3,726.33
6. Step 6: Final answer
   x = 5,018.13