Finding the Third Proportional to 3,729.09 and 8,123.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,729.09 : 8,123.91 = 8,123.91 : x
2. Step 2: Convert to fraction form
   3,729.09/8,123.91 = 8,123.91/x
3. Step 3: Cross multiply
   3,729.09x = 8,123.91 × 8,123.91
4. Step 4: Simplify right side
   3,729.09x = 65,997,852.76
5. Step 5: Solve for x
   x = 65,997,852.76/3,729.09
6. Step 6: Final answer
   x = 17,698.09