Finding the Third Proportional to 172,989 and 380,058

Step by Step Solution

1. Step 1: Write the proportion equation
   172,989 : 380,058 = 380,058 : x
2. Step 2: Convert to fraction form
   172,989/380,058 = 380,058/x
3. Step 3: Cross multiply
   172,989x = 380,058 × 380,058
4. Step 4: Simplify right side
   172,989x = 144,444,083,364
5. Step 5: Solve for x
   x = 144,444,083,364/172,989
6. Step 6: Final answer
   x = 834,989.99