Finding the Fourth Proportional to 1,516.78, 2,089.56 and 1,249.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,516.78 : 2,089.56 = 1,249.48 : x
2. Step 2: Convert to fraction form
   1,516.78/2,089.56 = 1,249.48/x
3. Step 3: Cross multiply
   1,516.78x = 2,089.56 × 1,249.48
4. Step 4: Simplify right side
   1,516.78x = 2,610,863.43
5. Step 5: Solve for x
   x = 2,610,863.43/1,516.78
6. Step 6: Final answer
   x = 1,721.32