Finding the Third Proportional to 1,681.25 and 3,663.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681.25 : 3,663.50 = 3,663.50 : x
2. Step 2: Convert to fraction form
   1,681.25/3,663.50 = 3,663.50/x
3. Step 3: Cross multiply
   1,681.25x = 3,663.50 × 3,663.50
4. Step 4: Simplify right side
   1,681.25x = 13,421,232.25
5. Step 5: Solve for x
   x = 13,421,232.25/1,681.25
6. Step 6: Final answer
   x = 7,982.89