Finding the Third Proportional to 2,139.56 and 3,200.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.56 : 3,200.44 = 3,200.44 : x
2. Step 2: Convert to fraction form
   2,139.56/3,200.44 = 3,200.44/x
3. Step 3: Cross multiply
   2,139.56x = 3,200.44 × 3,200.44
4. Step 4: Simplify right side
   2,139.56x = 10,242,800.19
5. Step 5: Solve for x
   x = 10,242,800.19/2,139.56
6. Step 6: Final answer
   x = 4,787.33