Finding the Third Proportional to 2,129 and 3,518.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129 : 3,518.25 = 3,518.25 : x
2. Step 2: Convert to fraction form
   2,129/3,518.25 = 3,518.25/x
3. Step 3: Cross multiply
   2,129x = 3,518.25 × 3,518.25
4. Step 4: Simplify right side
   2,129x = 12,378,083.06
5. Step 5: Solve for x
   x = 12,378,083.06/2,129
6. Step 6: Final answer
   x = 5,814.04