Finding the Third Proportional to 396,819 and 598,804.50

Step by Step Solution

1. Step 1: Write the proportion equation
   396,819 : 598,804.50 = 598,804.50 : x
2. Step 2: Convert to fraction form
   396,819/598,804.50 = 598,804.50/x
3. Step 3: Cross multiply
   396,819x = 598,804.50 × 598,804.50
4. Step 4: Simplify right side
   396,819x = 358,566,829,220.25
5. Step 5: Solve for x
   x = 358,566,829,220.25/396,819
6. Step 6: Final answer
   x = 903,602.98