Finding the Third Proportional to 2,160.42 and 5,040.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.42 : 5,040.35 = 5,040.35 : x
2. Step 2: Convert to fraction form
   2,160.42/5,040.35 = 5,040.35/x
3. Step 3: Cross multiply
   2,160.42x = 5,040.35 × 5,040.35
4. Step 4: Simplify right side
   2,160.42x = 25,405,143.87
5. Step 5: Solve for x
   x = 25,405,143.87/2,160.42
6. Step 6: Final answer
   x = 11,759.34