Finding the Third Proportional to 138,837.38 and 299,268

Step by Step Solution

1. Step 1: Write the proportion equation
   138,837.38 : 299,268 = 299,268 : x
2. Step 2: Convert to fraction form
   138,837.38/299,268 = 299,268/x
3. Step 3: Cross multiply
   138,837.38x = 299,268 × 299,268
4. Step 4: Simplify right side
   138,837.38x = 89,561,335,824
5. Step 5: Solve for x
   x = 89,561,335,824/138,837.38
6. Step 6: Final answer
   x = 645,080.88