Finding the Third Proportional to 383,377.50 and 580,440

Step by Step Solution

1. Step 1: Write the proportion equation
   383,377.50 : 580,440 = 580,440 : x
2. Step 2: Convert to fraction form
   383,377.50/580,440 = 580,440/x
3. Step 3: Cross multiply
   383,377.50x = 580,440 × 580,440
4. Step 4: Simplify right side
   383,377.50x = 336,910,593,600
5. Step 5: Solve for x
   x = 336,910,593,600/383,377.50
6. Step 6: Final answer
   x = 878,795.95