Finding the Third Proportional to 144,288 and 308,178

Step by Step Solution

1. Step 1: Write the proportion equation
   144,288 : 308,178 = 308,178 : x
2. Step 2: Convert to fraction form
   144,288/308,178 = 308,178/x
3. Step 3: Cross multiply
   144,288x = 308,178 × 308,178
4. Step 4: Simplify right side
   144,288x = 94,973,679,684
5. Step 5: Solve for x
   x = 94,973,679,684/144,288
6. Step 6: Final answer
   x = 658,223.00