Finding the Third Proportional to 173,410.50 and 258,940.50

Step by Step Solution

1. Step 1: Write the proportion equation
   173,410.50 : 258,940.50 = 258,940.50 : x
2. Step 2: Convert to fraction form
   173,410.50/258,940.50 = 258,940.50/x
3. Step 3: Cross multiply
   173,410.50x = 258,940.50 × 258,940.50
4. Step 4: Simplify right side
   173,410.50x = 67,050,182,540.25
5. Step 5: Solve for x
   x = 67,050,182,540.25/173,410.50
6. Step 6: Final answer
   x = 386,655.84