Finding the Third Proportional to 1,718.72 and 3,140.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,718.72 : 3,140.86 = 3,140.86 : x
2. Step 2: Convert to fraction form
   1,718.72/3,140.86 = 3,140.86/x
3. Step 3: Cross multiply
   1,718.72x = 3,140.86 × 3,140.86
4. Step 4: Simplify right side
   1,718.72x = 9,864,997.61
5. Step 5: Solve for x
   x = 9,864,997.61/1,718.72
6. Step 6: Final answer
   x = 5,739.74