Finding the Third Proportional to 7,128.84 and 15,680.25

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.84 : 15,680.25 = 15,680.25 : x
2. Step 2: Convert to fraction form
   7,128.84/15,680.25 = 15,680.25/x
3. Step 3: Cross multiply
   7,128.84x = 15,680.25 × 15,680.25
4. Step 4: Simplify right side
   7,128.84x = 245,870,240.06
5. Step 5: Solve for x
   x = 245,870,240.06/7,128.84
6. Step 6: Final answer
   x = 34,489.50