Finding the Third Proportional to 383,638 and 580,787.50

Step by Step Solution

1. Step 1: Write the proportion equation
   383,638 : 580,787.50 = 580,787.50 : x
2. Step 2: Convert to fraction form
   383,638/580,787.50 = 580,787.50/x
3. Step 3: Cross multiply
   383,638x = 580,787.50 × 580,787.50
4. Step 4: Simplify right side
   383,638x = 337,314,120,156.25
5. Step 5: Solve for x
   x = 337,314,120,156.25/383,638
6. Step 6: Final answer
   x = 879,251.07