Finding the Third Proportional to 9,805.50 and 12,278.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,805.50 : 12,278.25 = 12,278.25 : x
2. Step 2: Convert to fraction form
   9,805.50/12,278.25 = 12,278.25/x
3. Step 3: Cross multiply
   9,805.50x = 12,278.25 × 12,278.25
4. Step 4: Simplify right side
   9,805.50x = 150,755,423.06
5. Step 5: Solve for x
   x = 150,755,423.06/9,805.50
6. Step 6: Final answer
   x = 15,374.58