Finding the Third Proportional to 1,978.49 and 3,132.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.49 : 3,132.90 = 3,132.90 : x
2. Step 2: Convert to fraction form
   1,978.49/3,132.90 = 3,132.90/x
3. Step 3: Cross multiply
   1,978.49x = 3,132.90 × 3,132.90
4. Step 4: Simplify right side
   1,978.49x = 9,815,040.38
5. Step 5: Solve for x
   x = 9,815,040.38/1,978.49
6. Step 6: Final answer
   x = 4,960.88