Finding the Third Proportional to 3,802.78 and 8,143.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,802.78 : 8,143.03 = 8,143.03 : x
2. Step 2: Convert to fraction form
   3,802.78/8,143.03 = 8,143.03/x
3. Step 3: Cross multiply
   3,802.78x = 8,143.03 × 8,143.03
4. Step 4: Simplify right side
   3,802.78x = 66,308,957.94
5. Step 5: Solve for x
   x = 66,308,957.94/3,802.78
6. Step 6: Final answer
   x = 17,436.96