Finding the Third Proportional to 128,871 and 304,701.75

Step by Step Solution

1. Step 1: Write the proportion equation
   128,871 : 304,701.75 = 304,701.75 : x
2. Step 2: Convert to fraction form
   128,871/304,701.75 = 304,701.75/x
3. Step 3: Cross multiply
   128,871x = 304,701.75 × 304,701.75
4. Step 4: Simplify right side
   128,871x = 92,843,156,453.06
5. Step 5: Solve for x
   x = 92,843,156,453.06/128,871
6. Step 6: Final answer
   x = 720,434.83