Finding the Third Proportional to 139,939 and 301,988

Step by Step Solution

1. Step 1: Write the proportion equation
   139,939 : 301,988 = 301,988 : x
2. Step 2: Convert to fraction form
   139,939/301,988 = 301,988/x
3. Step 3: Cross multiply
   139,939x = 301,988 × 301,988
4. Step 4: Simplify right side
   139,939x = 91,196,752,144
5. Step 5: Solve for x
   x = 91,196,752,144/139,939
6. Step 6: Final answer
   x = 651,689.32