Finding the Fourth Proportional to 2,672.69, 3,688.17 and 1,553.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.69 : 3,688.17 = 1,553.45 : x
2. Step 2: Convert to fraction form
   2,672.69/3,688.17 = 1,553.45/x
3. Step 3: Cross multiply
   2,672.69x = 3,688.17 × 1,553.45
4. Step 4: Simplify right side
   2,672.69x = 5,729,369.25
5. Step 5: Solve for x
   x = 5,729,369.25/2,672.69
6. Step 6: Final answer
   x = 2,143.67