Finding the Fourth Proportional to 1,676.68, 2,513.59 and 636.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,676.68 : 2,513.59 = 636.10 : x
2. Step 2: Convert to fraction form
   1,676.68/2,513.59 = 636.10/x
3. Step 3: Cross multiply
   1,676.68x = 2,513.59 × 636.10
4. Step 4: Simplify right side
   1,676.68x = 1,598,894.60
5. Step 5: Solve for x
   x = 1,598,894.60/1,676.68
6. Step 6: Final answer
   x = 953.61