Finding the Third Proportional to 128,608.88 and 282,118.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,608.88 : 282,118.50 = 282,118.50 : x
2. Step 2: Convert to fraction form
   128,608.88/282,118.50 = 282,118.50/x
3. Step 3: Cross multiply
   128,608.88x = 282,118.50 × 282,118.50
4. Step 4: Simplify right side
   128,608.88x = 79,590,848,042.25
5. Step 5: Solve for x
   x = 79,590,848,042.25/128,608.88
6. Step 6: Final answer
   x = 618,859.69