Finding the Third Proportional to 225,132 and 356,490

Step by Step Solution

1. Step 1: Write the proportion equation
   225,132 : 356,490 = 356,490 : x
2. Step 2: Convert to fraction form
   225,132/356,490 = 356,490/x
3. Step 3: Cross multiply
   225,132x = 356,490 × 356,490
4. Step 4: Simplify right side
   225,132x = 127,085,120,100
5. Step 5: Solve for x
   x = 127,085,120,100/225,132
6. Step 6: Final answer
   x = 564,491.59