Finding the Third Proportional to 280,558 and 435,310.50

Step by Step Solution

1. Step 1: Write the proportion equation
   280,558 : 435,310.50 = 435,310.50 : x
2. Step 2: Convert to fraction form
   280,558/435,310.50 = 435,310.50/x
3. Step 3: Cross multiply
   280,558x = 435,310.50 × 435,310.50
4. Step 4: Simplify right side
   280,558x = 189,495,231,410.25
5. Step 5: Solve for x
   x = 189,495,231,410.25/280,558
6. Step 6: Final answer
   x = 675,422.66