Finding the Third Proportional to 3,663.75 and 8,434.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,663.75 : 8,434.88 = 8,434.88 : x
2. Step 2: Convert to fraction form
   3,663.75/8,434.88 = 8,434.88/x
3. Step 3: Cross multiply
   3,663.75x = 8,434.88 × 8,434.88
4. Step 4: Simplify right side
   3,663.75x = 71,147,116.27
5. Step 5: Solve for x
   x = 71,147,116.27/3,663.75
6. Step 6: Final answer
   x = 19,419.21