Finding the Third Proportional to 78,787.69 and 172,882.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,787.69 : 172,882.69 = 172,882.69 : x
2. Step 2: Convert to fraction form
   78,787.69/172,882.69 = 172,882.69/x
3. Step 3: Cross multiply
   78,787.69x = 172,882.69 × 172,882.69
4. Step 4: Simplify right side
   78,787.69x = 29,888,423,637.22
5. Step 5: Solve for x
   x = 29,888,423,637.22/78,787.69
6. Step 6: Final answer
   x = 379,353.99