Finding the Third Proportional to 1,989.56 and 4,647.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.56 : 4,647.38 = 4,647.38 : x
2. Step 2: Convert to fraction form
   1,989.56/4,647.38 = 4,647.38/x
3. Step 3: Cross multiply
   1,989.56x = 4,647.38 × 4,647.38
4. Step 4: Simplify right side
   1,989.56x = 21,598,094.39
5. Step 5: Solve for x
   x = 21,598,094.39/1,989.56
6. Step 6: Final answer
   x = 10,855.70