Finding the Third Proportional to 9,864.56 and 13,290.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,864.56 : 13,290.75 = 13,290.75 : x
2. Step 2: Convert to fraction form
   9,864.56/13,290.75 = 13,290.75/x
3. Step 3: Cross multiply
   9,864.56x = 13,290.75 × 13,290.75
4. Step 4: Simplify right side
   9,864.56x = 176,644,035.56
5. Step 5: Solve for x
   x = 176,644,035.56/9,864.56
6. Step 6: Final answer
   x = 17,906.93