Finding the Third Proportional to 181,388 and 423,570

Step by Step Solution

1. Step 1: Write the proportion equation
   181,388 : 423,570 = 423,570 : x
2. Step 2: Convert to fraction form
   181,388/423,570 = 423,570/x
3. Step 3: Cross multiply
   181,388x = 423,570 × 423,570
4. Step 4: Simplify right side
   181,388x = 179,411,544,900
5. Step 5: Solve for x
   x = 179,411,544,900/181,388
6. Step 6: Final answer
   x = 989,103.72