Finding the Fourth Proportional to 2,672.31, 3,687.26 and 1,553.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.31 : 3,687.26 = 1,553.25 : x
2. Step 2: Convert to fraction form
   2,672.31/3,687.26 = 1,553.25/x
3. Step 3: Cross multiply
   2,672.31x = 3,687.26 × 1,553.25
4. Step 4: Simplify right side
   2,672.31x = 5,727,228.83
5. Step 5: Solve for x
   x = 5,727,228.83/2,672.31
6. Step 6: Final answer
   x = 2,143.18