Finding the Third Proportional to 138,556.50 and 297,834

Step by Step Solution

1. Step 1: Write the proportion equation
   138,556.50 : 297,834 = 297,834 : x
2. Step 2: Convert to fraction form
   138,556.50/297,834 = 297,834/x
3. Step 3: Cross multiply
   138,556.50x = 297,834 × 297,834
4. Step 4: Simplify right side
   138,556.50x = 88,705,091,556
5. Step 5: Solve for x
   x = 88,705,091,556/138,556.50
6. Step 6: Final answer
   x = 640,208.81