Finding the Third Proportional to 245,080.69 and 378,487.69

Step by Step Solution

1. Step 1: Write the proportion equation
   245,080.69 : 378,487.69 = 378,487.69 : x
2. Step 2: Convert to fraction form
   245,080.69/378,487.69 = 378,487.69/x
3. Step 3: Cross multiply
   245,080.69x = 378,487.69 × 378,487.69
4. Step 4: Simplify right side
   245,080.69x = 143,252,929,589.10
5. Step 5: Solve for x
   x = 143,252,929,589.10/245,080.69
6. Step 6: Final answer
   x = 584,513.33