Finding the Third Proportional to 316,603.69 and 693,442.69

Step by Step Solution

1. Step 1: Write the proportion equation
   316,603.69 : 693,442.69 = 693,442.69 : x
2. Step 2: Convert to fraction form
   316,603.69/693,442.69 = 693,442.69/x
3. Step 3: Cross multiply
   316,603.69x = 693,442.69 × 693,442.69
4. Step 4: Simplify right side
   316,603.69x = 480,862,760,847.22
5. Step 5: Solve for x
   x = 480,862,760,847.22/316,603.69
6. Step 6: Final answer
   x = 1,518,816.05