Finding the Third Proportional to 280,072.69 and 607,564.55

Step by Step Solution

1. Step 1: Write the proportion equation
   280,072.69 : 607,564.55 = 607,564.55 : x
2. Step 2: Convert to fraction form
   280,072.69/607,564.55 = 607,564.55/x
3. Step 3: Cross multiply
   280,072.69x = 607,564.55 × 607,564.55
4. Step 4: Simplify right side
   280,072.69x = 369,134,678,619.42
5. Step 5: Solve for x
   x = 369,134,678,619.42/280,072.69
6. Step 6: Final answer
   x = 1,317,995.99