Finding the Third Proportional to 401,487 and 550,540.50

Step by Step Solution

1. Step 1: Write the proportion equation
   401,487 : 550,540.50 = 550,540.50 : x
2. Step 2: Convert to fraction form
   401,487/550,540.50 = 550,540.50/x
3. Step 3: Cross multiply
   401,487x = 550,540.50 × 550,540.50
4. Step 4: Simplify right side
   401,487x = 303,094,842,140.25
5. Step 5: Solve for x
   x = 303,094,842,140.25/401,487
6. Step 6: Final answer
   x = 754,930.65