Finding the Third Proportional to 280,300.50 and 434,853.56

Step by Step Solution

1. Step 1: Write the proportion equation
   280,300.50 : 434,853.56 = 434,853.56 : x
2. Step 2: Convert to fraction form
   280,300.50/434,853.56 = 434,853.56/x
3. Step 3: Cross multiply
   280,300.50x = 434,853.56 × 434,853.56
4. Step 4: Simplify right side
   280,300.50x = 189,097,620,818.94
5. Step 5: Solve for x
   x = 189,097,620,818.94/280,300.50
6. Step 6: Final answer
   x = 674,624.63