Finding the Third Proportional to 78,656 and 171,134

Step by Step Solution

1. Step 1: Write the proportion equation
   78,656 : 171,134 = 171,134 : x
2. Step 2: Convert to fraction form
   78,656/171,134 = 171,134/x
3. Step 3: Cross multiply
   78,656x = 171,134 × 171,134
4. Step 4: Simplify right side
   78,656x = 29,286,845,956
5. Step 5: Solve for x
   x = 29,286,845,956/78,656
6. Step 6: Final answer
   x = 372,340.90