Finding the Fourth Proportional to 2,672.88, 3,688.32 and 1,553.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.88 : 3,688.32 = 1,553.46 : x
2. Step 2: Convert to fraction form
   2,672.88/3,688.32 = 1,553.46/x
3. Step 3: Cross multiply
   2,672.88x = 3,688.32 × 1,553.46
4. Step 4: Simplify right side
   2,672.88x = 5,729,657.59
5. Step 5: Solve for x
   x = 5,729,657.59/2,672.88
6. Step 6: Final answer
   x = 2,143.63