Finding the Third Proportional to 167,172 and 258,960

Step by Step Solution

1. Step 1: Write the proportion equation
   167,172 : 258,960 = 258,960 : x
2. Step 2: Convert to fraction form
   167,172/258,960 = 258,960/x
3. Step 3: Cross multiply
   167,172x = 258,960 × 258,960
4. Step 4: Simplify right side
   167,172x = 67,060,281,600
5. Step 5: Solve for x
   x = 67,060,281,600/167,172
6. Step 6: Final answer
   x = 401,145.42