Finding the Third Proportional to 357,636 and 776,784

Step by Step Solution

1. Step 1: Write the proportion equation
   357,636 : 776,784 = 776,784 : x
2. Step 2: Convert to fraction form
   357,636/776,784 = 776,784/x
3. Step 3: Cross multiply
   357,636x = 776,784 × 776,784
4. Step 4: Simplify right side
   357,636x = 603,393,382,656
5. Step 5: Solve for x
   x = 603,393,382,656/357,636
6. Step 6: Final answer
   x = 1,687,171.82