Finding the Third Proportional to 7,964.89 and 12,290.48

Step by Step Solution

1. Step 1: Write the proportion equation
   7,964.89 : 12,290.48 = 12,290.48 : x
2. Step 2: Convert to fraction form
   7,964.89/12,290.48 = 12,290.48/x
3. Step 3: Cross multiply
   7,964.89x = 12,290.48 × 12,290.48
4. Step 4: Simplify right side
   7,964.89x = 151,056,006.17
5. Step 5: Solve for x
   x = 151,056,006.17/7,964.89
6. Step 6: Final answer
   x = 18,965.22