Finding the Third Proportional to 1,279.88 and 2,040.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.88 : 2,040.56 = 2,040.56 : x
2. Step 2: Convert to fraction form
   1,279.88/2,040.56 = 2,040.56/x
3. Step 3: Cross multiply
   1,279.88x = 2,040.56 × 2,040.56
4. Step 4: Simplify right side
   1,279.88x = 4,163,895.32
5. Step 5: Solve for x
   x = 4,163,895.32/1,279.88
6. Step 6: Final answer
   x = 3,253.36