Finding the Third Proportional to 12,915.50 and 19,630.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.50 : 19,630.50 = 19,630.50 : x
2. Step 2: Convert to fraction form
   12,915.50/19,630.50 = 19,630.50/x
3. Step 3: Cross multiply
   12,915.50x = 19,630.50 × 19,630.50
4. Step 4: Simplify right side
   12,915.50x = 385,356,530.25
5. Step 5: Solve for x
   x = 385,356,530.25/12,915.50
6. Step 6: Final answer
   x = 29,836.75