Finding the Third Proportional to 383,640 and 580,788

Step by Step Solution

1. Step 1: Write the proportion equation
   383,640 : 580,788 = 580,788 : x
2. Step 2: Convert to fraction form
   383,640/580,788 = 580,788/x
3. Step 3: Cross multiply
   383,640x = 580,788 × 580,788
4. Step 4: Simplify right side
   383,640x = 337,314,700,944
5. Step 5: Solve for x
   x = 337,314,700,944/383,640
6. Step 6: Final answer
   x = 879,248.00