Finding the Third Proportional to 71,389.69 and 169,126.31

Step by Step Solution

1. Step 1: Write the proportion equation
   71,389.69 : 169,126.31 = 169,126.31 : x
2. Step 2: Convert to fraction form
   71,389.69/169,126.31 = 169,126.31/x
3. Step 3: Cross multiply
   71,389.69x = 169,126.31 × 169,126.31
4. Step 4: Simplify right side
   71,389.69x = 28,603,709,579.85
5. Step 5: Solve for x
   x = 28,603,709,579.85/71,389.69
6. Step 6: Final answer
   x = 400,670.05