Finding the Third Proportional to 64,855.69 and 142,013.25

Step by Step Solution

1. Step 1: Write the proportion equation
   64,855.69 : 142,013.25 = 142,013.25 : x
2. Step 2: Convert to fraction form
   64,855.69/142,013.25 = 142,013.25/x
3. Step 3: Cross multiply
   64,855.69x = 142,013.25 × 142,013.25
4. Step 4: Simplify right side
   64,855.69x = 20,167,763,175.56
5. Step 5: Solve for x
   x = 20,167,763,175.56/64,855.69
6. Step 6: Final answer
   x = 310,963.68