Finding the Third Proportional to 82,930.50 and 128,081.25

Step by Step Solution

1. Step 1: Write the proportion equation
   82,930.50 : 128,081.25 = 128,081.25 : x
2. Step 2: Convert to fraction form
   82,930.50/128,081.25 = 128,081.25/x
3. Step 3: Cross multiply
   82,930.50x = 128,081.25 × 128,081.25
4. Step 4: Simplify right side
   82,930.50x = 16,404,806,601.56
5. Step 5: Solve for x
   x = 16,404,806,601.56/82,930.50
6. Step 6: Final answer
   x = 197,813.91