Finding the Third Proportional to 138,447 and 300,910.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,447 : 300,910.50 = 300,910.50 : x
2. Step 2: Convert to fraction form
   138,447/300,910.50 = 300,910.50/x
3. Step 3: Cross multiply
   138,447x = 300,910.50 × 300,910.50
4. Step 4: Simplify right side
   138,447x = 90,547,129,010.25
5. Step 5: Solve for x
   x = 90,547,129,010.25/138,447
6. Step 6: Final answer
   x = 654,020.16