Finding the Third Proportional to 173,116.50 and 258,983.06

Step by Step Solution

1. Step 1: Write the proportion equation
   173,116.50 : 258,983.06 = 258,983.06 : x
2. Step 2: Convert to fraction form
   173,116.50/258,983.06 = 258,983.06/x
3. Step 3: Cross multiply
   173,116.50x = 258,983.06 × 258,983.06
4. Step 4: Simplify right side
   173,116.50x = 67,072,226,661.88
5. Step 5: Solve for x
   x = 67,072,226,661.88/173,116.50
6. Step 6: Final answer
   x = 387,439.83