Finding the Third Proportional to 1,681.86 and 3,447.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681.86 : 3,447.72 = 3,447.72 : x
2. Step 2: Convert to fraction form
   1,681.86/3,447.72 = 3,447.72/x
3. Step 3: Cross multiply
   1,681.86x = 3,447.72 × 3,447.72
4. Step 4: Simplify right side
   1,681.86x = 11,886,778.05
5. Step 5: Solve for x
   x = 11,886,778.05/1,681.86
6. Step 6: Final answer
   x = 7,067.65