Finding the Third Proportional to 139,644 and 298,973.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,644 : 298,973.25 = 298,973.25 : x
2. Step 2: Convert to fraction form
   139,644/298,973.25 = 298,973.25/x
3. Step 3: Cross multiply
   139,644x = 298,973.25 × 298,973.25
4. Step 4: Simplify right side
   139,644x = 89,385,004,215.56
5. Step 5: Solve for x
   x = 89,385,004,215.56/139,644
6. Step 6: Final answer
   x = 640,091.98