Finding the Third Proportional to 138,642.89 and 298,301.48

Step by Step Solution

1. Step 1: Write the proportion equation
   138,642.89 : 298,301.48 = 298,301.48 : x
2. Step 2: Convert to fraction form
   138,642.89/298,301.48 = 298,301.48/x
3. Step 3: Cross multiply
   138,642.89x = 298,301.48 × 298,301.48
4. Step 4: Simplify right side
   138,642.89x = 88,983,775,580.33
5. Step 5: Solve for x
   x = 88,983,775,580.33/138,642.89
6. Step 6: Final answer
   x = 641,819.97