Finding the Third Proportional to 139,185 and 304,969.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,185 : 304,969.50 = 304,969.50 : x
2. Step 2: Convert to fraction form
   139,185/304,969.50 = 304,969.50/x
3. Step 3: Cross multiply
   139,185x = 304,969.50 × 304,969.50
4. Step 4: Simplify right side
   139,185x = 93,006,395,930.25
5. Step 5: Solve for x
   x = 93,006,395,930.25/139,185
6. Step 6: Final answer
   x = 668,221.40