Finding the Third Proportional to 139,943 and 301,990

Step by Step Solution

1. Step 1: Write the proportion equation
   139,943 : 301,990 = 301,990 : x
2. Step 2: Convert to fraction form
   139,943/301,990 = 301,990/x
3. Step 3: Cross multiply
   139,943x = 301,990 × 301,990
4. Step 4: Simplify right side
   139,943x = 91,197,960,100
5. Step 5: Solve for x
   x = 91,197,960,100/139,943
6. Step 6: Final answer
   x = 651,679.33