Finding the Third Proportional to 139,650 and 298,986

Step by Step Solution

1. Step 1: Write the proportion equation
   139,650 : 298,986 = 298,986 : x
2. Step 2: Convert to fraction form
   139,650/298,986 = 298,986/x
3. Step 3: Cross multiply
   139,650x = 298,986 × 298,986
4. Step 4: Simplify right side
   139,650x = 89,392,628,196
5. Step 5: Solve for x
   x = 89,392,628,196/139,650
6. Step 6: Final answer
   x = 640,119.07