Finding the Fourth Proportional to 1,676.48, 2,513.76 and 689.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,676.48 : 2,513.76 = 689.01 : x
2. Step 2: Convert to fraction form
   1,676.48/2,513.76 = 689.01/x
3. Step 3: Cross multiply
   1,676.48x = 2,513.76 × 689.01
4. Step 4: Simplify right side
   1,676.48x = 1,732,005.78
5. Step 5: Solve for x
   x = 1,732,005.78/1,676.48
6. Step 6: Final answer
   x = 1,033.12