Finding the Third Proportional to 144,670 and 316,058

Step by Step Solution

1. Step 1: Write the proportion equation
   144,670 : 316,058 = 316,058 : x
2. Step 2: Convert to fraction form
   144,670/316,058 = 316,058/x
3. Step 3: Cross multiply
   144,670x = 316,058 × 316,058
4. Step 4: Simplify right side
   144,670x = 99,892,659,364
5. Step 5: Solve for x
   x = 99,892,659,364/144,670
6. Step 6: Final answer
   x = 690,486.34