Finding the Third Proportional to 128,304 and 281,758.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,304 : 281,758.50 = 281,758.50 : x
2. Step 2: Convert to fraction form
   128,304/281,758.50 = 281,758.50/x
3. Step 3: Cross multiply
   128,304x = 281,758.50 × 281,758.50
4. Step 4: Simplify right side
   128,304x = 79,387,852,322.25
5. Step 5: Solve for x
   x = 79,387,852,322.25/128,304
6. Step 6: Final answer
   x = 618,748.07