Finding the Fourth Proportional to 2,672.84, 3,688.32 and 1,553.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.84 : 3,688.32 = 1,553.78 : x
2. Step 2: Convert to fraction form
   2,672.84/3,688.32 = 1,553.78/x
3. Step 3: Cross multiply
   2,672.84x = 3,688.32 × 1,553.78
4. Step 4: Simplify right side
   2,672.84x = 5,730,837.85
5. Step 5: Solve for x
   x = 5,730,837.85/2,672.84
6. Step 6: Final answer
   x = 2,144.10