Finding the Third Proportional to 399,886.50 and 844,728

Step by Step Solution

1. Step 1: Write the proportion equation
   399,886.50 : 844,728 = 844,728 : x
2. Step 2: Convert to fraction form
   399,886.50/844,728 = 844,728/x
3. Step 3: Cross multiply
   399,886.50x = 844,728 × 844,728
4. Step 4: Simplify right side
   399,886.50x = 713,565,393,984
5. Step 5: Solve for x
   x = 713,565,393,984/399,886.50
6. Step 6: Final answer
   x = 1,784,419.81