Finding the Third Proportional to 138,105 and 300,813

Step by Step Solution

1. Step 1: Write the proportion equation
   138,105 : 300,813 = 300,813 : x
2. Step 2: Convert to fraction form
   138,105/300,813 = 300,813/x
3. Step 3: Cross multiply
   138,105x = 300,813 × 300,813
4. Step 4: Simplify right side
   138,105x = 90,488,460,969
5. Step 5: Solve for x
   x = 90,488,460,969/138,105
6. Step 6: Final answer
   x = 655,214.95