Finding the Third Proportional to 280,272 and 435,175.88

Step by Step Solution

1. Step 1: Write the proportion equation
   280,272 : 435,175.88 = 435,175.88 : x
2. Step 2: Convert to fraction form
   280,272/435,175.88 = 435,175.88/x
3. Step 3: Cross multiply
   280,272x = 435,175.88 × 435,175.88
4. Step 4: Simplify right side
   280,272x = 189,378,042,182.02
5. Step 5: Solve for x
   x = 189,378,042,182.02/280,272
6. Step 6: Final answer
   x = 675,693.76