Finding the Third Proportional to 140,238 and 300,147.75

Step by Step Solution

1. Step 1: Write the proportion equation
   140,238 : 300,147.75 = 300,147.75 : x
2. Step 2: Convert to fraction form
   140,238/300,147.75 = 300,147.75/x
3. Step 3: Cross multiply
   140,238x = 300,147.75 × 300,147.75
4. Step 4: Simplify right side
   140,238x = 90,088,671,830.06
5. Step 5: Solve for x
   x = 90,088,671,830.06/140,238
6. Step 6: Final answer
   x = 642,398.44