Finding the Third Proportional to 280,072.69 and 607,302.56

Step by Step Solution

1. Step 1: Write the proportion equation
   280,072.69 : 607,302.56 = 607,302.56 : x
2. Step 2: Convert to fraction form
   280,072.69/607,302.56 = 607,302.56/x
3. Step 3: Cross multiply
   280,072.69x = 607,302.56 × 607,302.56
4. Step 4: Simplify right side
   280,072.69x = 368,816,402,419.07
5. Step 5: Solve for x
   x = 368,816,402,419.07/280,072.69
6. Step 6: Final answer
   x = 1,316,859.58