Finding the Third Proportional to 280,072.50 and 437,604

Step by Step Solution

1. Step 1: Write the proportion equation
   280,072.50 : 437,604 = 437,604 : x
2. Step 2: Convert to fraction form
   280,072.50/437,604 = 437,604/x
3. Step 3: Cross multiply
   280,072.50x = 437,604 × 437,604
4. Step 4: Simplify right side
   280,072.50x = 191,497,260,816
5. Step 5: Solve for x
   x = 191,497,260,816/280,072.50
6. Step 6: Final answer
   x = 683,741.75