Finding the Third Proportional to 399,884.50 and 844,724

Step by Step Solution

1. Step 1: Write the proportion equation
   399,884.50 : 844,724 = 844,724 : x
2. Step 2: Convert to fraction form
   399,884.50/844,724 = 844,724/x
3. Step 3: Cross multiply
   399,884.50x = 844,724 × 844,724
4. Step 4: Simplify right side
   399,884.50x = 713,558,636,176
5. Step 5: Solve for x
   x = 713,558,636,176/399,884.50
6. Step 6: Final answer
   x = 1,784,411.84