Finding the Third Proportional to 139,512 and 301,488

Step by Step Solution

1. Step 1: Write the proportion equation
   139,512 : 301,488 = 301,488 : x
2. Step 2: Convert to fraction form
   139,512/301,488 = 301,488/x
3. Step 3: Cross multiply
   139,512x = 301,488 × 301,488
4. Step 4: Simplify right side
   139,512x = 90,895,014,144
5. Step 5: Solve for x
   x = 90,895,014,144/139,512
6. Step 6: Final answer
   x = 651,521.12