Finding the Third Proportional to 78,743.39 and 172,795.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,743.39 : 172,795.78 = 172,795.78 : x
2. Step 2: Convert to fraction form
   78,743.39/172,795.78 = 172,795.78/x
3. Step 3: Cross multiply
   78,743.39x = 172,795.78 × 172,795.78
4. Step 4: Simplify right side
   78,743.39x = 29,858,382,017.80
5. Step 5: Solve for x
   x = 29,858,382,017.80/78,743.39
6. Step 6: Final answer
   x = 379,185.88