Finding the Third Proportional to 1,644 and 3,591.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644 : 3,591.50 = 3,591.50 : x
2. Step 2: Convert to fraction form
   1,644/3,591.50 = 3,591.50/x
3. Step 3: Cross multiply
   1,644x = 3,591.50 × 3,591.50
4. Step 4: Simplify right side
   1,644x = 12,898,872.25
5. Step 5: Solve for x
   x = 12,898,872.25/1,644
6. Step 6: Final answer
   x = 7,846.03