Finding the Third Proportional to 349,892 and 557,012

Step by Step Solution

1. Step 1: Write the proportion equation
   349,892 : 557,012 = 557,012 : x
2. Step 2: Convert to fraction form
   349,892/557,012 = 557,012/x
3. Step 3: Cross multiply
   349,892x = 557,012 × 557,012
4. Step 4: Simplify right side
   349,892x = 310,262,368,144
5. Step 5: Solve for x
   x = 310,262,368,144/349,892
6. Step 6: Final answer
   x = 886,737.53