Finding the Third Proportional to 143,229 and 315,058

Step by Step Solution

1. Step 1: Write the proportion equation
   143,229 : 315,058 = 315,058 : x
2. Step 2: Convert to fraction form
   143,229/315,058 = 315,058/x
3. Step 3: Cross multiply
   143,229x = 315,058 × 315,058
4. Step 4: Simplify right side
   143,229x = 99,261,543,364
5. Step 5: Solve for x
   x = 99,261,543,364/143,229
6. Step 6: Final answer
   x = 693,026.85