Finding the Third Proportional to 144,903 and 309,060

Step by Step Solution

1. Step 1: Write the proportion equation
   144,903 : 309,060 = 309,060 : x
2. Step 2: Convert to fraction form
   144,903/309,060 = 309,060/x
3. Step 3: Cross multiply
   144,903x = 309,060 × 309,060
4. Step 4: Simplify right side
   144,903x = 95,518,083,600
5. Step 5: Solve for x
   x = 95,518,083,600/144,903
6. Step 6: Final answer
   x = 659,186.38