Finding the Third Proportional to 173,118.50 and 258,986

Step by Step Solution

1. Step 1: Write the proportion equation
   173,118.50 : 258,986 = 258,986 : x
2. Step 2: Convert to fraction form
   173,118.50/258,986 = 258,986/x
3. Step 3: Cross multiply
   173,118.50x = 258,986 × 258,986
4. Step 4: Simplify right side
   173,118.50x = 67,073,748,196
5. Step 5: Solve for x
   x = 67,073,748,196/173,118.50
6. Step 6: Final answer
   x = 387,444.14