Finding the Third Proportional to 139,070 and 300,312

Step by Step Solution

1. Step 1: Write the proportion equation
   139,070 : 300,312 = 300,312 : x
2. Step 2: Convert to fraction form
   139,070/300,312 = 300,312/x
3. Step 3: Cross multiply
   139,070x = 300,312 × 300,312
4. Step 4: Simplify right side
   139,070x = 90,187,297,344
5. Step 5: Solve for x
   x = 90,187,297,344/139,070
6. Step 6: Final answer
   x = 648,502.89