Finding the Third Proportional to 2,603.81 and 5,579.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.81 : 5,579.72 = 5,579.72 : x
2. Step 2: Convert to fraction form
   2,603.81/5,579.72 = 5,579.72/x
3. Step 3: Cross multiply
   2,603.81x = 5,579.72 × 5,579.72
4. Step 4: Simplify right side
   2,603.81x = 31,133,261.33
5. Step 5: Solve for x
   x = 31,133,261.33/2,603.81
6. Step 6: Final answer
   x = 11,956.80