Finding the Third Proportional to 143,238.38 and 298,238.63

Step by Step Solution

1. Step 1: Write the proportion equation
   143,238.38 : 298,238.63 = 298,238.63 : x
2. Step 2: Convert to fraction form
   143,238.38/298,238.63 = 298,238.63/x
3. Step 3: Cross multiply
   143,238.38x = 298,238.63 × 298,238.63
4. Step 4: Simplify right side
   143,238.38x = 88,946,277,441.89
5. Step 5: Solve for x
   x = 88,946,277,441.89/143,238.38
6. Step 6: Final answer
   x = 620,966.81