Finding the Fourth Proportional to 2,643.72, 3,665.03 and 2,503.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.72 : 3,665.03 = 2,503.26 : x
2. Step 2: Convert to fraction form
   2,643.72/3,665.03 = 2,503.26/x
3. Step 3: Cross multiply
   2,643.72x = 3,665.03 × 2,503.26
4. Step 4: Simplify right side
   2,643.72x = 9,174,510.48
5. Step 5: Solve for x
   x = 9,174,510.48/2,643.72
6. Step 6: Final answer
   x = 3,470.30