Finding the Third Proportional to 82,502.25 and 128,680.88

Step by Step Solution

1. Step 1: Write the proportion equation
   82,502.25 : 128,680.88 = 128,680.88 : x
2. Step 2: Convert to fraction form
   82,502.25/128,680.88 = 128,680.88/x
3. Step 3: Cross multiply
   82,502.25x = 128,680.88 × 128,680.88
4. Step 4: Simplify right side
   82,502.25x = 16,558,767,590.77
5. Step 5: Solve for x
   x = 16,558,767,590.77/82,502.25
6. Step 6: Final answer
   x = 200,706.86