Finding the Third Proportional to 128,494.69 and 281,977.88

Step by Step Solution

1. Step 1: Write the proportion equation
   128,494.69 : 281,977.88 = 281,977.88 : x
2. Step 2: Convert to fraction form
   128,494.69/281,977.88 = 281,977.88/x
3. Step 3: Cross multiply
   128,494.69x = 281,977.88 × 281,977.88
4. Step 4: Simplify right side
   128,494.69x = 79,511,521,989.52
5. Step 5: Solve for x
   x = 79,511,521,989.52/128,494.69
6. Step 6: Final answer
   x = 618,792.29