Finding the Third Proportional to 1,663.31 and 3,955.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,663.31 : 3,955.78 = 3,955.78 : x
2. Step 2: Convert to fraction form
   1,663.31/3,955.78 = 3,955.78/x
3. Step 3: Cross multiply
   1,663.31x = 3,955.78 × 3,955.78
4. Step 4: Simplify right side
   1,663.31x = 15,648,205.30
5. Step 5: Solve for x
   x = 15,648,205.30/1,663.31
6. Step 6: Final answer
   x = 9,407.86