Finding the Third Proportional to 310,904 and 456,150

Step by Step Solution

1. Step 1: Write the proportion equation
   310,904 : 456,150 = 456,150 : x
2. Step 2: Convert to fraction form
   310,904/456,150 = 456,150/x
3. Step 3: Cross multiply
   310,904x = 456,150 × 456,150
4. Step 4: Simplify right side
   310,904x = 208,072,822,500
5. Step 5: Solve for x
   x = 208,072,822,500/310,904
6. Step 6: Final answer
   x = 669,251.03