Finding the Third Proportional to 78,486.50 and 171,804

Step by Step Solution

1. Step 1: Write the proportion equation
   78,486.50 : 171,804 = 171,804 : x
2. Step 2: Convert to fraction form
   78,486.50/171,804 = 171,804/x
3. Step 3: Cross multiply
   78,486.50x = 171,804 × 171,804
4. Step 4: Simplify right side
   78,486.50x = 29,516,614,416
5. Step 5: Solve for x
   x = 29,516,614,416/78,486.50
6. Step 6: Final answer
   x = 376,072.50