Finding the Third Proportional to 138,808 and 301,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,808 : 301,399.50 = 301,399.50 : x
2. Step 2: Convert to fraction form
   138,808/301,399.50 = 301,399.50/x
3. Step 3: Cross multiply
   138,808x = 301,399.50 × 301,399.50
4. Step 4: Simplify right side
   138,808x = 90,841,658,600.25
5. Step 5: Solve for x
   x = 90,841,658,600.25/138,808
6. Step 6: Final answer
   x = 654,441.09