Finding the Third Proportional to 139,000 and 305,064

Step by Step Solution

1. Step 1: Write the proportion equation
   139,000 : 305,064 = 305,064 : x
2. Step 2: Convert to fraction form
   139,000/305,064 = 305,064/x
3. Step 3: Cross multiply
   139,000x = 305,064 × 305,064
4. Step 4: Simplify right side
   139,000x = 93,064,044,096
5. Step 5: Solve for x
   x = 93,064,044,096/139,000
6. Step 6: Final answer
   x = 669,525.50