Finding the Third Proportional to 1,215.84 and 2,076.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215.84 : 2,076.89 = 2,076.89 : x
2. Step 2: Convert to fraction form
   1,215.84/2,076.89 = 2,076.89/x
3. Step 3: Cross multiply
   1,215.84x = 2,076.89 × 2,076.89
4. Step 4: Simplify right side
   1,215.84x = 4,313,474.67
5. Step 5: Solve for x
   x = 4,313,474.67/1,215.84
6. Step 6: Final answer
   x = 3,547.72