Finding the Third Proportional to 143,567 and 210,910

Step by Step Solution

1. Step 1: Write the proportion equation
   143,567 : 210,910 = 210,910 : x
2. Step 2: Convert to fraction form
   143,567/210,910 = 210,910/x
3. Step 3: Cross multiply
   143,567x = 210,910 × 210,910
4. Step 4: Simplify right side
   143,567x = 44,483,028,100
5. Step 5: Solve for x
   x = 44,483,028,100/143,567
6. Step 6: Final answer
   x = 309,841.59