Finding the Third Proportional to 72,011 and 170,145

Step by Step Solution

1. Step 1: Write the proportion equation
   72,011 : 170,145 = 170,145 : x
2. Step 2: Convert to fraction form
   72,011/170,145 = 170,145/x
3. Step 3: Cross multiply
   72,011x = 170,145 × 170,145
4. Step 4: Simplify right side
   72,011x = 28,949,321,025
5. Step 5: Solve for x
   x = 28,949,321,025/72,011
6. Step 6: Final answer
   x = 402,012.48