Finding the Third Proportional to 280,113 and 434,452.50

Step by Step Solution

1. Step 1: Write the proportion equation
   280,113 : 434,452.50 = 434,452.50 : x
2. Step 2: Convert to fraction form
   280,113/434,452.50 = 434,452.50/x
3. Step 3: Cross multiply
   280,113x = 434,452.50 × 434,452.50
4. Step 4: Simplify right side
   280,113x = 188,748,974,756.25
5. Step 5: Solve for x
   x = 188,748,974,756.25/280,113
6. Step 6: Final answer
   x = 673,831.54