Finding the Third Proportional to 1,989.94 and 4,339.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.94 : 4,339.31 = 4,339.31 : x
2. Step 2: Convert to fraction form
   1,989.94/4,339.31 = 4,339.31/x
3. Step 3: Cross multiply
   1,989.94x = 4,339.31 × 4,339.31
4. Step 4: Simplify right side
   1,989.94x = 18,829,632.97
5. Step 5: Solve for x
   x = 18,829,632.97/1,989.94
6. Step 6: Final answer
   x = 9,462.42