Finding the Third Proportional to 1,686.38 and 2,617.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.38 : 2,617.88 = 2,617.88 : x
2. Step 2: Convert to fraction form
   1,686.38/2,617.88 = 2,617.88/x
3. Step 3: Cross multiply
   1,686.38x = 2,617.88 × 2,617.88
4. Step 4: Simplify right side
   1,686.38x = 6,853,269.52
5. Step 5: Solve for x
   x = 6,853,269.52/1,686.38
6. Step 6: Final answer
   x = 4,063.91