Finding the Third Proportional to 275,544 and 390,001.50

Step by Step Solution

1. Step 1: Write the proportion equation
   275,544 : 390,001.50 = 390,001.50 : x
2. Step 2: Convert to fraction form
   275,544/390,001.50 = 390,001.50/x
3. Step 3: Cross multiply
   275,544x = 390,001.50 × 390,001.50
4. Step 4: Simplify right side
   275,544x = 152,101,170,002.25
5. Step 5: Solve for x
   x = 152,101,170,002.25/275,544
6. Step 6: Final answer
   x = 552,003.20