Finding the Third Proportional to 76,114.69 and 172,153.69

Step by Step Solution

1. Step 1: Write the proportion equation
   76,114.69 : 172,153.69 = 172,153.69 : x
2. Step 2: Convert to fraction form
   76,114.69/172,153.69 = 172,153.69/x
3. Step 3: Cross multiply
   76,114.69x = 172,153.69 × 172,153.69
4. Step 4: Simplify right side
   76,114.69x = 29,636,892,119.85
5. Step 5: Solve for x
   x = 29,636,892,119.85/76,114.69
6. Step 6: Final answer
   x = 389,371.53