Finding the Third Proportional to 288,329.50 and 619,280

Step by Step Solution

1. Step 1: Write the proportion equation
   288,329.50 : 619,280 = 619,280 : x
2. Step 2: Convert to fraction form
   288,329.50/619,280 = 619,280/x
3. Step 3: Cross multiply
   288,329.50x = 619,280 × 619,280
4. Step 4: Simplify right side
   288,329.50x = 383,507,718,400
5. Step 5: Solve for x
   x = 383,507,718,400/288,329.50
6. Step 6: Final answer
   x = 1,330,102.26