Finding the Third Proportional to 14,278.50 and 20,930.50

Step by Step Solution

1. Step 1: Write the proportion equation
   14,278.50 : 20,930.50 = 20,930.50 : x
2. Step 2: Convert to fraction form
   14,278.50/20,930.50 = 20,930.50/x
3. Step 3: Cross multiply
   14,278.50x = 20,930.50 × 20,930.50
4. Step 4: Simplify right side
   14,278.50x = 438,085,830.25
5. Step 5: Solve for x
   x = 438,085,830.25/14,278.50
6. Step 6: Final answer
   x = 30,681.50