Finding the Third Proportional to 51,196.50 and 80,139

Step by Step Solution

1. Step 1: Write the proportion equation
   51,196.50 : 80,139 = 80,139 : x
2. Step 2: Convert to fraction form
   51,196.50/80,139 = 80,139/x
3. Step 3: Cross multiply
   51,196.50x = 80,139 × 80,139
4. Step 4: Simplify right side
   51,196.50x = 6,422,259,321
5. Step 5: Solve for x
   x = 6,422,259,321/51,196.50
6. Step 6: Final answer
   x = 125,443.33