Finding the Third Proportional to 550,608 and 807,715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   550,608 : 807,715.50 = 807,715.50 : x
2. Step 2: Convert to fraction form
   550,608/807,715.50 = 807,715.50/x
3. Step 3: Cross multiply
   550,608x = 807,715.50 × 807,715.50
4. Step 4: Simplify right side
   550,608x = 652,404,328,940.25
5. Step 5: Solve for x
   x = 652,404,328,940.25/550,608
6. Step 6: Final answer
   x = 1,184,879.86