Finding the Third Proportional to 138,568.50 and 297,855

Step by Step Solution

1. Step 1: Write the proportion equation
   138,568.50 : 297,855 = 297,855 : x
2. Step 2: Convert to fraction form
   138,568.50/297,855 = 297,855/x
3. Step 3: Cross multiply
   138,568.50x = 297,855 × 297,855
4. Step 4: Simplify right side
   138,568.50x = 88,717,601,025
5. Step 5: Solve for x
   x = 88,717,601,025/138,568.50
6. Step 6: Final answer
   x = 640,243.64