Finding the Third Proportional to 396,089.50 and 824,819

Step by Step Solution

1. Step 1: Write the proportion equation
   396,089.50 : 824,819 = 824,819 : x
2. Step 2: Convert to fraction form
   396,089.50/824,819 = 824,819/x
3. Step 3: Cross multiply
   396,089.50x = 824,819 × 824,819
4. Step 4: Simplify right side
   396,089.50x = 680,326,382,761
5. Step 5: Solve for x
   x = 680,326,382,761/396,089.50
6. Step 6: Final answer
   x = 1,717,607.72