Finding the Fourth Proportional to 3,726.72, 5,140.89 and 2,309.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,726.72 : 5,140.89 = 2,309.94 : x
2. Step 2: Convert to fraction form
   3,726.72/5,140.89 = 2,309.94/x
3. Step 3: Cross multiply
   3,726.72x = 5,140.89 × 2,309.94
4. Step 4: Simplify right side
   3,726.72x = 11,875,147.45
5. Step 5: Solve for x
   x = 11,875,147.45/3,726.72
6. Step 6: Final answer
   x = 3,186.49