Finding the Third Proportional to 128,682 and 304,168.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,682 : 304,168.50 = 304,168.50 : x
2. Step 2: Convert to fraction form
   128,682/304,168.50 = 304,168.50/x
3. Step 3: Cross multiply
   128,682x = 304,168.50 × 304,168.50
4. Step 4: Simplify right side
   128,682x = 92,518,476,392.25
5. Step 5: Solve for x
   x = 92,518,476,392.25/128,682
6. Step 6: Final answer
   x = 718,969.84