Finding the Third Proportional to 85,676.48 and 173,429.86

Step by Step Solution

1. Step 1: Write the proportion equation
   85,676.48 : 173,429.86 = 173,429.86 : x
2. Step 2: Convert to fraction form
   85,676.48/173,429.86 = 173,429.86/x
3. Step 3: Cross multiply
   85,676.48x = 173,429.86 × 173,429.86
4. Step 4: Simplify right side
   85,676.48x = 30,077,916,122.83
5. Step 5: Solve for x
   x = 30,077,916,122.83/85,676.48
6. Step 6: Final answer
   x = 351,063.85