Finding the Third Proportional to 138,419 and 301,851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,419 : 301,851.50 = 301,851.50 : x
2. Step 2: Convert to fraction form
   138,419/301,851.50 = 301,851.50/x
3. Step 3: Cross multiply
   138,419x = 301,851.50 × 301,851.50
4. Step 4: Simplify right side
   138,419x = 91,114,328,052.25
5. Step 5: Solve for x
   x = 91,114,328,052.25/138,419
6. Step 6: Final answer
   x = 658,250.15