Finding the Third Proportional to 142,929 and 210,114

Step by Step Solution

1. Step 1: Write the proportion equation
   142,929 : 210,114 = 210,114 : x
2. Step 2: Convert to fraction form
   142,929/210,114 = 210,114/x
3. Step 3: Cross multiply
   142,929x = 210,114 × 210,114
4. Step 4: Simplify right side
   142,929x = 44,147,892,996
5. Step 5: Solve for x
   x = 44,147,892,996/142,929
6. Step 6: Final answer
   x = 308,879.88