Finding the Third Proportional to 4,915.88 and 7,787.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,915.88 : 7,787.72 = 7,787.72 : x
2. Step 2: Convert to fraction form
   4,915.88/7,787.72 = 7,787.72/x
3. Step 3: Cross multiply
   4,915.88x = 7,787.72 × 7,787.72
4. Step 4: Simplify right side
   4,915.88x = 60,648,563.33
5. Step 5: Solve for x
   x = 60,648,563.33/4,915.88
6. Step 6: Final answer
   x = 12,337.29