Finding the Third Proportional to 140,076.88 and 209,620.31

Step by Step Solution

1. Step 1: Write the proportion equation
   140,076.88 : 209,620.31 = 209,620.31 : x
2. Step 2: Convert to fraction form
   140,076.88/209,620.31 = 209,620.31/x
3. Step 3: Cross multiply
   140,076.88x = 209,620.31 × 209,620.31
4. Step 4: Simplify right side
   140,076.88x = 43,940,675,412.60
5. Step 5: Solve for x
   x = 43,940,675,412.60/140,076.88
6. Step 6: Final answer
   x = 313,689.72