Finding the Third Proportional to 12,931.50 and 19,768.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.50 : 19,768.50 = 19,768.50 : x
2. Step 2: Convert to fraction form
   12,931.50/19,768.50 = 19,768.50/x
3. Step 3: Cross multiply
   12,931.50x = 19,768.50 × 19,768.50
4. Step 4: Simplify right side
   12,931.50x = 390,793,592.25
5. Step 5: Solve for x
   x = 390,793,592.25/12,931.50
6. Step 6: Final answer
   x = 30,220.28