Finding the Third Proportional to 138,769.31 and 298,951.31

Step by Step Solution

1. Step 1: Write the proportion equation
   138,769.31 : 298,951.31 = 298,951.31 : x
2. Step 2: Convert to fraction form
   138,769.31/298,951.31 = 298,951.31/x
3. Step 3: Cross multiply
   138,769.31x = 298,951.31 × 298,951.31
4. Step 4: Simplify right side
   138,769.31x = 89,371,887,245.47
5. Step 5: Solve for x
   x = 89,371,887,245.47/138,769.31
6. Step 6: Final answer
   x = 644,032.07