Finding the Third Proportional to 388,401.75 and 830,772

Step by Step Solution

1. Step 1: Write the proportion equation
   388,401.75 : 830,772 = 830,772 : x
2. Step 2: Convert to fraction form
   388,401.75/830,772 = 830,772/x
3. Step 3: Cross multiply
   388,401.75x = 830,772 × 830,772
4. Step 4: Simplify right side
   388,401.75x = 690,182,115,984
5. Step 5: Solve for x
   x = 690,182,115,984/388,401.75
6. Step 6: Final answer
   x = 1,776,979.93