Finding the Third Proportional to 139,488 and 296,400

Step by Step Solution

1. Step 1: Write the proportion equation
   139,488 : 296,400 = 296,400 : x
2. Step 2: Convert to fraction form
   139,488/296,400 = 296,400/x
3. Step 3: Cross multiply
   139,488x = 296,400 × 296,400
4. Step 4: Simplify right side
   139,488x = 87,852,960,000
5. Step 5: Solve for x
   x = 87,852,960,000/139,488
6. Step 6: Final answer
   x = 629,824.50