Finding the Third Proportional to 280,435 and 435,056.50

Step by Step Solution

1. Step 1: Write the proportion equation
   280,435 : 435,056.50 = 435,056.50 : x
2. Step 2: Convert to fraction form
   280,435/435,056.50 = 435,056.50/x
3. Step 3: Cross multiply
   280,435x = 435,056.50 × 435,056.50
4. Step 4: Simplify right side
   280,435x = 189,274,158,192.25
5. Step 5: Solve for x
   x = 189,274,158,192.25/280,435
6. Step 6: Final answer
   x = 674,930.58