Finding the Third Proportional to 388,369.69 and 830,710.69

Step by Step Solution

1. Step 1: Write the proportion equation
   388,369.69 : 830,710.69 = 830,710.69 : x
2. Step 2: Convert to fraction form
   388,369.69/830,710.69 = 830,710.69/x
3. Step 3: Cross multiply
   388,369.69x = 830,710.69 × 830,710.69
4. Step 4: Simplify right side
   388,369.69x = 690,080,246,326.72
5. Step 5: Solve for x
   x = 690,080,246,326.72/388,369.69
6. Step 6: Final answer
   x = 1,776,864.33