Finding the Third Proportional to 138,559.50 and 297,837

Step by Step Solution

1. Step 1: Write the proportion equation
   138,559.50 : 297,837 = 297,837 : x
2. Step 2: Convert to fraction form
   138,559.50/297,837 = 297,837/x
3. Step 3: Cross multiply
   138,559.50x = 297,837 × 297,837
4. Step 4: Simplify right side
   138,559.50x = 88,706,878,569
5. Step 5: Solve for x
   x = 88,706,878,569/138,559.50
6. Step 6: Final answer
   x = 640,207.84