Finding the Third Proportional to 288,369 and 619,364.25

Step by Step Solution

1. Step 1: Write the proportion equation
   288,369 : 619,364.25 = 619,364.25 : x
2. Step 2: Convert to fraction form
   288,369/619,364.25 = 619,364.25/x
3. Step 3: Cross multiply
   288,369x = 619,364.25 × 619,364.25
4. Step 4: Simplify right side
   288,369x = 383,612,074,178.06
5. Step 5: Solve for x
   x = 383,612,074,178.06/288,369
6. Step 6: Final answer
   x = 1,330,281.94