Finding the Third Proportional to 139,988 and 297,256

Step by Step Solution

1. Step 1: Write the proportion equation
   139,988 : 297,256 = 297,256 : x
2. Step 2: Convert to fraction form
   139,988/297,256 = 297,256/x
3. Step 3: Cross multiply
   139,988x = 297,256 × 297,256
4. Step 4: Simplify right side
   139,988x = 88,361,129,536
5. Step 5: Solve for x
   x = 88,361,129,536/139,988
6. Step 6: Final answer
   x = 631,205.03