Finding the Third Proportional to 170,742 and 258,460.50

Step by Step Solution

1. Step 1: Write the proportion equation
   170,742 : 258,460.50 = 258,460.50 : x
2. Step 2: Convert to fraction form
   170,742/258,460.50 = 258,460.50/x
3. Step 3: Cross multiply
   170,742x = 258,460.50 × 258,460.50
4. Step 4: Simplify right side
   170,742x = 66,801,830,060.25
5. Step 5: Solve for x
   x = 66,801,830,060.25/170,742
6. Step 6: Final answer
   x = 391,244.28