Finding the Third Proportional to 2,420.53 and 5,131.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,420.53 : 5,131.69 = 5,131.69 : x
2. Step 2: Convert to fraction form
   2,420.53/5,131.69 = 5,131.69/x
3. Step 3: Cross multiply
   2,420.53x = 5,131.69 × 5,131.69
4. Step 4: Simplify right side
   2,420.53x = 26,334,220.83
5. Step 5: Solve for x
   x = 26,334,220.83/2,420.53
6. Step 6: Final answer
   x = 10,879.53