Finding the Third Proportional to 280,411.50 and 423,963

Step by Step Solution

1. Step 1: Write the proportion equation
   280,411.50 : 423,963 = 423,963 : x
2. Step 2: Convert to fraction form
   280,411.50/423,963 = 423,963/x
3. Step 3: Cross multiply
   280,411.50x = 423,963 × 423,963
4. Step 4: Simplify right side
   280,411.50x = 179,744,625,369
5. Step 5: Solve for x
   x = 179,744,625,369/280,411.50
6. Step 6: Final answer
   x = 641,003.05