Finding the Third Proportional to 288,303 and 619,231.50

Step by Step Solution

1. Step 1: Write the proportion equation
   288,303 : 619,231.50 = 619,231.50 : x
2. Step 2: Convert to fraction form
   288,303/619,231.50 = 619,231.50/x
3. Step 3: Cross multiply
   288,303x = 619,231.50 × 619,231.50
4. Step 4: Simplify right side
   288,303x = 383,447,650,592.25
5. Step 5: Solve for x
   x = 383,447,650,592.25/288,303
6. Step 6: Final answer
   x = 1,330,016.17