Finding the Third Proportional to 128,995.50 and 281,418

Step by Step Solution

1. Step 1: Write the proportion equation
   128,995.50 : 281,418 = 281,418 : x
2. Step 2: Convert to fraction form
   128,995.50/281,418 = 281,418/x
3. Step 3: Cross multiply
   128,995.50x = 281,418 × 281,418
4. Step 4: Simplify right side
   128,995.50x = 79,196,090,724
5. Step 5: Solve for x
   x = 79,196,090,724/128,995.50
6. Step 6: Final answer
   x = 613,944.60