Finding the Third Proportional to 78,636.75 and 171,097.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,636.75 : 171,097.50 = 171,097.50 : x
2. Step 2: Convert to fraction form
   78,636.75/171,097.50 = 171,097.50/x
3. Step 3: Cross multiply
   78,636.75x = 171,097.50 × 171,097.50
4. Step 4: Simplify right side
   78,636.75x = 29,274,354,506.25
5. Step 5: Solve for x
   x = 29,274,354,506.25/78,636.75
6. Step 6: Final answer
   x = 372,273.20