Finding the Third Proportional to 2,187.84 and 3,399.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.84 : 3,399.89 = 3,399.89 : x
2. Step 2: Convert to fraction form
   2,187.84/3,399.89 = 3,399.89/x
3. Step 3: Cross multiply
   2,187.84x = 3,399.89 × 3,399.89
4. Step 4: Simplify right side
   2,187.84x = 11,559,256.26
5. Step 5: Solve for x
   x = 11,559,256.26/2,187.84
6. Step 6: Final answer
   x = 5,283.40