Finding the Third Proportional to 371,640 and 548,710

Step by Step Solution

1. Step 1: Write the proportion equation
   371,640 : 548,710 = 548,710 : x
2. Step 2: Convert to fraction form
   371,640/548,710 = 548,710/x
3. Step 3: Cross multiply
   371,640x = 548,710 × 548,710
4. Step 4: Simplify right side
   371,640x = 301,082,664,100
5. Step 5: Solve for x
   x = 301,082,664,100/371,640
6. Step 6: Final answer
   x = 810,146.01