Finding the Third Proportional to 287,058 and 448,028

Step by Step Solution

1. Step 1: Write the proportion equation
   287,058 : 448,028 = 448,028 : x
2. Step 2: Convert to fraction form
   287,058/448,028 = 448,028/x
3. Step 3: Cross multiply
   287,058x = 448,028 × 448,028
4. Step 4: Simplify right side
   287,058x = 200,729,088,784
5. Step 5: Solve for x
   x = 200,729,088,784/287,058
6. Step 6: Final answer
   x = 699,263.18