Finding the Third Proportional to 548,259 and 822,385.50

Step by Step Solution

1. Step 1: Write the proportion equation
   548,259 : 822,385.50 = 822,385.50 : x
2. Step 2: Convert to fraction form
   548,259/822,385.50 = 822,385.50/x
3. Step 3: Cross multiply
   548,259x = 822,385.50 × 822,385.50
4. Step 4: Simplify right side
   548,259x = 676,317,910,610.25
5. Step 5: Solve for x
   x = 676,317,910,610.25/548,259
6. Step 6: Final answer
   x = 1,233,573.75