Finding the Third Proportional to 2,657.81 and 5,680.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657.81 : 5,680.13 = 5,680.13 : x
2. Step 2: Convert to fraction form
   2,657.81/5,680.13 = 5,680.13/x
3. Step 3: Cross multiply
   2,657.81x = 5,680.13 × 5,680.13
4. Step 4: Simplify right side
   2,657.81x = 32,263,820.02
5. Step 5: Solve for x
   x = 32,263,820.02/2,657.81
6. Step 6: Final answer
   x = 12,139.24