Finding the Third Proportional to 280,918 and 619,098.50

Step by Step Solution

1. Step 1: Write the proportion equation
   280,918 : 619,098.50 = 619,098.50 : x
2. Step 2: Convert to fraction form
   280,918/619,098.50 = 619,098.50/x
3. Step 3: Cross multiply
   280,918x = 619,098.50 × 619,098.50
4. Step 4: Simplify right side
   280,918x = 383,282,952,702.25
5. Step 5: Solve for x
   x = 383,282,952,702.25/280,918
6. Step 6: Final answer
   x = 1,364,394.42