Finding the Third Proportional to 142,145.72 and 207,658.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,145.72 : 207,658.69 = 207,658.69 : x
2. Step 2: Convert to fraction form
   142,145.72/207,658.69 = 207,658.69/x
3. Step 3: Cross multiply
   142,145.72x = 207,658.69 × 207,658.69
4. Step 4: Simplify right side
   142,145.72x = 43,122,130,494.22
5. Step 5: Solve for x
   x = 43,122,130,494.22/142,145.72
6. Step 6: Final answer
   x = 303,365.66