Finding the Third Proportional to 9,818.72 and 13,959.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,818.72 : 13,959.21 = 13,959.21 : x
2. Step 2: Convert to fraction form
   9,818.72/13,959.21 = 13,959.21/x
3. Step 3: Cross multiply
   9,818.72x = 13,959.21 × 13,959.21
4. Step 4: Simplify right side
   9,818.72x = 194,859,570.00
5. Step 5: Solve for x
   x = 194,859,570.00/9,818.72
6. Step 6: Final answer
   x = 19,845.72