Finding the Third Proportional to 3,724.31 and 7,989.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,724.31 : 7,989.47 = 7,989.47 : x
2. Step 2: Convert to fraction form
   3,724.31/7,989.47 = 7,989.47/x
3. Step 3: Cross multiply
   3,724.31x = 7,989.47 × 7,989.47
4. Step 4: Simplify right side
   3,724.31x = 63,831,610.91
5. Step 5: Solve for x
   x = 63,831,610.91/3,724.31
6. Step 6: Final answer
   x = 17,139.17